Issues
#1 November 1964
#2 February 1965
#3 August 1965
#4 April 1966
#5 July 1966
#6 October 1966
#7 December 1966
#8 February 1967
#9 April 1967
#10 June 1967
#11 August 1967
#12 December 1970
#13 March 1971
#14 September 1971
#15+1 printing December 1971
#16+1 printing March 1972
#17+2 printings June 1972
#18+1 printing September 1972
#19 November 1972
#20 March 1973
#21 June 1973
#22+1 printing September 1973
#23 December 1973
#24 March 1974
#25+1 printing June 1974
#26+1 printing September 1974
#27+1 printing December 1974
#28 March 1975
#29 June 1975
#30+1 printing September 1975
#31+1 printing December 1975
#32+1 printing March 1976
#33 April 1976
#34+1 printing June 1976
#35+1 printing August 1976
#36+1 printing October 1976
#37+1 printing December 1976
#38 February 1977
#39+1 printing April 1977
#40+1 printing June 1977
#41+1 printing August 1977
#42+1 printing October 1977
#43 December 1977
#44 February 1978