Issues
#1 #1 April 1972
#2 #2 May 1972
#3 #3 July 1972
#4 #4 September 1972
#5 #5 November 1972
#6 #6 January 1973
#7 #7 March 1973
#8 #8 May 1973
#9 #9 June 1973
#10 #10 July 1973
#11 #11 August 1973
#12 #12 September 1973
#13 #13 October 1973
#14 #14 November 1973
#15 #15 December 1973
#16 #16 January 1974
#17 #17 February 1974
#18 #18 March 1974
#19 #19 April 1974
#20 #20 May 1974
#21 #21 June 1974
#22 #22 July 1974
#23 #23 August 1974
#24 #24 September 1974
#25 #25 October 1974
#26 #26 November 1974
#27 #27 December 1974
#28 #28 January 1975
#29 #29 February 1975
#30 #30 March 1975
#31 #31 April 1975
#32 #32 May 1975
#33 #33 June 1975
#34 #34 July 1975
#35 #35 August 1975
#36 #36 September 1975
#37 #37 October 1975
#38 #38 November 1975
#39 #39 December 1975
#40 #40 January 1976
#41 #41 February 1976
#42 #42 March 1976
#43 #43 April 1976
#44 #44 May 1976
#45 #45 June 1976
#46 #46 July 1976
#47 #47 August 1976
#48 #48 September 1976
#49 #49 October 1976
#50 #50 November 1976
#51 #51 December 1976
#52 #52 January 1977
#53 #53 February 1977
#54 #54 March 1977
#55 #55 April 1977
#56 #56 May 1977
#57 #57 June 1977
#58 #58 July 1977
#59 #59 August 1977
#60 #60 September 1977
#61 #61 November 1977
#62 #62 January 1978
#63 #63 March 1978
#64 #64 May 1978
#65 #65 July 1978
#66 #66 September 1978
#67 #67 November 1978
#68 #68 February 1979
#69 #69 April 1979
#70 #70 August 1979