GB Stamps - British Philatelic Bulletin - Vol 11 #8 - April 1974
GB Stamps - British Philatelic Bulletin - Vol 13 # 8 - April 1976
GB Stamps - British Philatelic Bulletin - Vol 11 #5 - January 1974
GB Stamps - British Philatelic Bulletin - Vol 11 #7 - March 1974
GB Stamps - British Philatelic Bulletin - Vol 15 # 4 - December 1977
GB Stamps - British Philatelic Bulletin - Vol 37 # 11 - July 2000
GB Stamps - British Philatelic Bulletin - Vol 37 # 5 - January 2000
GB Stamps - British Philatelic Bulletin - Vol 52 # 4 - December 2014
GB Stamps - British Philatelic Bulletin - Vol 35 # 4 - December 1997
GB Stamps - British Philatelic Bulletin - Vol 19 # 1 - September 1981
GB Stamps - British Philatelic Bulletin - Vol 50 # 7 - March 2013
GB Stamps - British Philatelic Bulletin - Vol 19 # 5 - January 1982
GB Stamps - British Philatelic Bulletin - Vol 28 # 8 - April 1991
GB Stamps - British Philatelic Bulletin - Vol 20 # 1 - September 1982
GB Stamps - British Philatelic Bulletin - Vol 23 # 8 - April 1985
GB Stamps - British Philatelic Bulletin - Vol 11 #11 - July 1974
GB Stamps - British Philatelic Bulletin - Vol 38 # 8 - April 2001
GB Stamps - British Philatelic Bulletin - Vol 38 # 3 - November 2000
GB Stamps - British Philatelic Bulletin - Vol 25 # 5 - January 1988
GB Stamps - British Philatelic Bulletin - Vol 42 # 4 - December 2004
GB Stamps - British Philatelic Bulletin - Vol 48 # 9 - May 2011
GB Stamps - British Philatelic Bulletin - Vol 13 # 12 - August 1976
GB Stamps - British Philatelic Bulletin - Vol 32 # 11 - July 1995
GB Stamps - British Philatelic Bulletin - Vol 40 # 3 - November 2002
GB Stamps - British Philatelic Bulletin - Vol 12 #6 - February 1975
GB Stamps - British Philatelic Bulletin - Vol 51 # 12 - August 2014
GB Stamps - British Philatelic Bulletin - Vol 10 #7 - March 1973
GB Stamps - British Philatelic Bulletin - Vol 48 # 3 - November 2010
GB Stamps - British Philatelic Bulletin - Vol 28 # 12 - August 1991
GB Stamps - British Philatelic Bulletin - Vol 17 # 9 - May 1980
GB Stamps - British Philatelic Bulletin - Vol 13 # 2 - October 1975
GB Stamps - British Philatelic Bulletin - Vol 46 # 11 - July 2009
GB Stamps - British Philatelic Bulletin - Vol 18 # 7 - March 1981
GB Stamps - British Philatelic Bulletin - Vol 26 # 11 - July 1989
GB Stamps - British Philatelic Bulletin - Vol 30 # 9 - May 1993
GB Stamps - British Philatelic Bulletin - Vol 28 # 5 - January 1991
GB Stamps - British Philatelic Bulletin - Vol 37 # 6 - February 2000
GB Stamps - British Philatelic Bulletin - Vol 43 # 11 - July 2006
GB Stamps - British Philatelic Bulletin - Vol 49 # 3 - November 2011
GB Stamps - British Philatelic Bulletin - Vol 34 # 12 - August 1997