Issues
#1 #1 June 1974
#2 #2 August 1974
#3 #3 September 1974
#4 #4+1 printing October 1974
#5 #5+1 printing December 1974
#6 #6+1 printing February 1975
#7 #7+1 printing April 1975
#8 #8+1 printing June 1975
#9 #9+1 printing August 1975
#10 #10+1 printing October 1975
#11 #11+1 printing December 1975
#12 #12+1 printing February 1976
#13 #13+1 printing April 1976
#14 #14+2 printings May 1976
#15 #15+2 printings June 1976
#16 #16+2 printings July 1976
#17 #17+2 printings August 1976
#18 #18+1 printing September 1976
#19 #19+1 printing October 1976
#20 #20+1 printing December 1976
#21 #21+1 printing February 1977
#22 #22 April 1977
#23 #23+1 printing June 1977
#24 #24+1 printing August 1977
#25 #25+2 printings October 1977
#26 #26+1 printing December 1977
#27 #27+1 printing February 1978
#28 #28+1 printing April 1978
#29 #29+1 printing June 1978
#30 #30+1 printing August 1978
#31 #31+1 printing October 1978
#32 #32+1 printing December 1978
#33 #33+2 printings February 1979
#34 #34+1 printing April 1979
#35 #35+1 printing June 1979
#36 #36+1 printing August 1979
#37 #37+1 printing October 1979
#38 #38+1 printing December 1979
#39 #39+1 printing February 1980
#40 #40+1 printing April 1980
#41 #41+1 printing June 1980
#42 #42+1 printing August 1980
#43 #43+1 printing October 1980
#44 #44+1 printing December 1980
#45 #45+1 printing February 1981
#46 #46+2 printings April 1981
#47 #47+2 printings June 1981
#48 #48+2 printings August 1981
#49 #49+2 printings October 1981
#50 #50+2 printings December 1981
#51 #51+1 printing February 1982
#52 #52+1 printing April 1982
#53 #53+1 printing June 1982
#54 #54+1 printing August 1982
#55 #55+2 printings October 1982
#56 #56+2 printings December 1982
#57 #57+2 printings February 1983
#58 #58+2 printings April 1983
#59 #59+2 printings June 1983
#60 #60+2 printings August 1983
#61 #61+2 printings October 1983
#62 #62+2 printings December 1983
#63 #63+2 printings February 1984
#64 #64+2 printings April 1984
#65 #65+2 printings June 1984
#66 #66+2 printings August 1984
#67 #67+2 printings October 1984
#68 #68+2 printings December 1984
#69 #69+2 printings February 1985
#70 #70+2 printings April 1985
#71 #71+2 printings June 1985
#72 #72+2 printings August 1985
#73 #73+2 printings October 1985
#74 #74+2 printings December 1985
#75 #75+2 printings February 1986
#76 #76+2 printings April 1986
#77 #77+2 printings June 1986
#78 #78+2 printings August 1986
#79 #79+1 printing October 1986
#80 #80+1 printing December 1986
#81 #81+1 printing February 1987