| Covers listed |
|
| 1972: | #1 Vol 1 # 1/January, #2 Vol 1 # 2/March, #3 Vol 1 No 3/ June, #4 Vol 1 # 4/September, |
| 1973: | #5 Vol 2 # 1/January, #6 Vol 2 No 2/ March, #7 Vol 2 # 3/June, #8 Vol 2 # 4/September, |
| 1974: | #9 Vol 3 No 1/ January, #10 Vol 3 # 2/March, #11 Vol 3 # 3/June, #12 Vol 3 # 4/September, |
| 1975: | #13 Vol 4 # 1/January, #14 Vol 4 # 2/March, #15 Vol 4 # 3/June, #16 Vol 4 # 4/September, |
| 1976: | #17 Vol 5 # 1/January, #18 Vol 5 # 2/March, #19 Vol 5 # 3/4/June, |
| 1977: | #20 Vol 6 # 1/January, #21 Vol 6 # 2/March, |
| 1978: | #22 Vol 6 # 3/January, #23 Vol 6 # 4/March, #24 Vol 7 # 1/June, |
| 1979: | #25 Vol 7 # 2/January, #26 Vol 7 # 3/March, |
| 1980: | #27 Vol 7 # 4/January, #28 Vol 8 # 1/March, #29 Vol 8 # 2/June, #30 Vol 8 # 3/September, |
| 1981: | Vol 8 No 4 , #32 Vol 9 # 1/March, #33 Vol 9 # 2/June, #34 Vol 9 # 3/September, |
| 1982: | #35 Vol 9 # 4/January, #36 Vol 10 # 1/March, #37 Vol 10 # 2/June, #38 Vol 10 # 3/Fall/September, |
| 1983: | #39 Vol 10 # 4/January, #40 Vol 11 # 1/March, #41 Vol 11 # 2/June, #42 Vol 11 # 3/September, |
| 1984: | #43 Vol 11 # 4/January, #44 Vol 12 # 1/March, #45 Vol 12 # 2/June, #46 Vol 12 # 3/September, #47 Vol 12 # 4/December, |
| 1985: | #48 Vol 13 # 1/March, #49 Vol 13 # 2/Summer, #50 Vol 13 # 3/September, |
| 1986: | #51 Vol 13 # 4/Winter/January, #52 Vol 14 # 1/March, #53 Vol 14 # 2/Summer, #54 Vol 14 # 3/September, |
| 1987: | #55 Vol 14 # 4/Winter/January, #56 Vol 15 # 1/March, #57 Vol 15 # 2/June, #58 Vol 15 # 3/September, |
| 1988: | #59 Vol 15 # 4/Winter/January, #60 Vol 16 # 1/March, #61 Vol 16 # 2/Summer, #62 Vol 16 # 3/Fall/September, |
| 1989: | Vol 16 No 4Winter, #64 Vol 17 # 1, #65 Vol 17 # 2, #66 Vol 17 # 3, |
| 1990: | #67 Vol 17 # 4, #68 Vol 18 # 1, #69 Vol 18 # 2, #70 Vol 18 # 3, |
| 1991: | #71 Vol 18 # 4/Winter, #72 Vol 19 # 1, #73 Vol 19 # 2, #74 Vol 19 # 3/Fall, |
| 1992: | #75 Vol 19 # 4, #76 Vol 20 # 1, #77 Vol 20 # 2, #78 Vol 20 # 3, |
| 1993: | #79 Vol 20 No 4/Winter, #80 Vol 21 # 1/Spring, #81 Vol 21 # 2, #82 Vol 21 # 3, |
| 1994: | #83 Vol 21 # 4, #84 Vol 22 # 1, #85 Vol 22 # 2, #86 Vol 22 # 3, |
| 1995: | #87 Vol 22 # 4, #88 Vol 23 # 1, #89 Vol 23 # 2, #90 Vol 23 # 3, |
| 1996: | #91 Vol 23 # 4, #92 Vol 24 # 1, #93 Vol 24 # 2, #94 Vol 24 # 3, |
| 1997: | #95 Vol 24 No 4/Winter, #96 Vol 25 # 1, #97 Vol 25 # 2, #98 Vol 25 # 3, |
| 1998: | #99 Vol 25 # 4, #100 Vol 26 No 1/Spring, #101 Vol 26 No 2/Summer, #102 Vol 26 # 3, |
| 1999: | #103 Vol 26 # 4, #104 Vol 27 # 1, #105 Vol 27 # 2, #106 Vol 27 # 3, |
| 2000: | #107 Vol 27 # 4, #108 Vol 28 # 1, #109 Vol 28 # 2, #110 Vol 28 # 3, |
| 2001: | #111 Vol 28 # 4, #112 Vol 29 # 1, #113 Vol 29 # 2, #114 Vol 29 # 3, |
| 2002: | #115 Vol 29 # 4, #116 Vol 30 # 1, #117 Vol 30 # 2, #118 Vol 30 # 3, |
| 2003: | #119 Vol 30 # 4, #120 Vol 31 # 1, #121 Vol 31 # 2, #122 Vol 31 # 3, |
| 2004: | #123 Vol 31 # 4, #124 Vol 32 # 1, #125 Vol 32 # 2, #126 Vol 32 # 3/Fall, |
| 2005: | #127 Vol 32 # 4, #128 Vol 33 # 1, #129 Vol 33 # 2, #130 Vol 33 # 3, |
| 2006: | #131 Vol 33 # 4, #132 Vol 34 # 1, #133 Vol 34 # 2, #134 Vol 34 # 3, |
| 2007: | #135 Vol 34 # 4, #136 Vol 35 # 1, #137 Vol 35 # 2, #138 Vol 35 # 3, |
| 2008: | #139 Vol 35 # 4/Winter, #140 Vol 36 # 1, #141 Vol 36 # 2/Summer, #142 Vol 36 # 3, |
| 2009: | #143 Vol 36 # 4, #144 Vol 37 # 1, #145 Vol 37 # 2, #146 Vol 37 # 3, #147 Vol 37 # 4, |
| 2010: | #148 Vol 38 # 1, #149 Vol 38 # 2, #150 Vol 38 # 3, #151 Vol 38 # 4/Winter/December, |
| 2011: | #152 Vol 39 # 1, #153 Vol 39 # 2, |
| 2012: | Vol 40 No 1, |
| 2018: | Vol 46 No 1 , |
| 2019: | Vol 47 No 1 , Vol 47 No 4 , |
| 2020: | Vol 48 No 1 , Vol 48 No 2 , Vol 48 No 3 , |
| 2021: | Vol 49 No 2 , Vol 49 No 3 , |
| 2022: | Vol 50 No 1 , Vol 50 No 2 , |
| 2023: | Vol 51 No 2 , |
