diff --git a/Calcs.cpp b/Calcs.cpp
index d25ae40..956d867 100644
--- a/Calcs.cpp
+++ b/Calcs.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Calcs.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 /** \file
 'Calcs.cpp' is one of the files intended to hold the functions for 
 calculation purposes.
diff --git a/Calcs.h b/Calcs.h
index 3540104..bab0365 100644
--- a/Calcs.h
+++ b/Calcs.h
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Calcs.h
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #ifndef CALCSH
 #define CALCSH
 
diff --git a/Discrete.cpp b/Discrete.cpp
index e117a98..f134249 100644
--- a/Discrete.cpp
+++ b/Discrete.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Discrete.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 /** \file
 'Discrete.cpp' holds the code for implementing discrete, i.e. z-transform, filters.
 */
diff --git a/Discrete.h b/Discrete.h
index 9d5d12f..50d3678 100644
--- a/Discrete.h
+++ b/Discrete.h
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Discrete.h
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #ifndef DISCRETE_H
 #define DISCRETE_H
 
diff --git a/Drawing.h b/Drawing.h
index 873f4ca..0dd0e45 100644
--- a/Drawing.h
+++ b/Drawing.h
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Drawing.h
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #ifndef DRAWINGH
 #define DRAWINGH
 
diff --git a/Enums.h b/Enums.h
index 9ec53f3..a566fb9 100644
--- a/Enums.h
+++ b/Enums.h
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                               Enums.h
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #ifndef ENUMSH
 #define ENUMSH
 
diff --git a/Libraries_needed.txt b/Libraries_needed.txt
index 70224f7..d144530 100644
--- a/Libraries_needed.txt
+++ b/Libraries_needed.txt
@@ -4,8 +4,6 @@ libgnomeui-2.0
 gdk-pixbuf-xlib-2.0
 gtk+-2.0
 gdk-2.0
-libgnome-2.0
-libgnomeui-2.0
-gdk-pixbuf-xlib-2.0
+
 
 
diff --git a/Rauch.cpp b/Rauch.cpp
index 9f867ea..7102610 100644
--- a/Rauch.cpp
+++ b/Rauch.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Rauch.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
@@ -9,7 +18,7 @@
 #endif
 
 /*! \file Rauch.cpp
-	This program calculates the T and q values for a Rauch stage from the component values.
+	This program calculates the T and q values for a Rauch stage from the component values and vice-versa.
 */
 
 using namespace std;
@@ -156,6 +165,10 @@ void stage::synthesise_R_band(void)
 	double a, b, c;
 	double C;
 	double R;
+
+    cout << "There may be a problem in this function. Try another method of realization.\n";
+    return;
+
 #if SHOW_CALC
 	cout << "\nsynthesise_band\n";
 #endif
diff --git a/Sallen_and_Key.cpp b/Sallen_and_Key.cpp
index e57eb9e..afbe2dd 100644
--- a/Sallen_and_Key.cpp
+++ b/Sallen_and_Key.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                           Sallen_and_Key.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
diff --git a/Use_of_rbfilter.odt b/Use_of_rbfilter.odt
new file mode 100644
index 0000000..31210ad
Binary files /dev/null and b/Use_of_rbfilter.odt differ
diff --git a/bilinear.cpp b/bilinear.cpp
index 281c1e1..a2ea58e 100644
--- a/bilinear.cpp
+++ b/bilinear.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                Bilinear.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #include "math.h"
 #include <complex.h>
 #include "Calcs.h"
diff --git a/filter.h b/filter.h
index 4ab705a..f21865c 100644
--- a/filter.h
+++ b/filter.h
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                filter.h
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 #ifndef FILTER_H
 #define FILTER_H
 
diff --git a/main.cpp b/main.cpp
index a9dde7b..b7a5070 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,12 @@
+/******************************************************************************
+
+                                main.cpp
+
+                Copyright (c) Roger Burghall 2014..2017
+
+******************************************************************************/
+
+
 //*********************************************************
 
 #include "math.h"
diff --git a/rbfilter.cpp b/rbfilter.cpp
index 59cc81f..ba6563a 100644
--- a/rbfilter.cpp
+++ b/rbfilter.cpp
@@ -1,5 +1,7 @@
 /*! \mainpage FilterCalcs
-(c) 1971 .. 2016 Roger Burghall
+
+Copyright (c) 1971 .. 2016 Roger Burghall
+
 The original of this code was written in Fortran for the Digital
 Equipment Corporation PDP-12, beginning in the early 1970s, and then
 ported to the BBC Model B, and extended to provide more of the