| Covers listed |
|
| 1968: | #5 / November, #6 / December, |
| 1969: | #16 / , |
| 1970: | #20 / , #28 / , #30 / , |
| 1971: | #36 / , #39 / September, #40 / October, |
| 1972: | #44 / February, #46 / April, #47 / May, #48 / June, #50 / August, #54 / , |
| 1973: | #55 / January, #56 / February, #58 / March, #59 / May, #61 / July, #62 / August, #63 / September, #64 / October, #65 / November, #66 / December, |
| 1974: | #67 / January, #68 / February, #71 / May, #73 / July, #74 / August, #77 / November, |
| 1975: | #79 / January, #83 / May, #84 / June, #85 / July, #86 / August, #87 / September, #88 / October, #89 / November, #90 / December, |
| 1976: | #91 / January, #92 / February, #94 / April, #95 / May, #96 / June, #97 / July, #98 / August, #99 / September, #100 / October, #101 / November, #102 / December, |
| 1977: | #105 / March, #107 / May, #108 / June, #109 / July, #111 / September, #112 / October, #113 / November, #114 / December, |
| 1978: | #115 / January, #116 / February, #117 / March, #118 / April, #119 / May, #120 / June, #121 / July, #122 / August, #123 / September, #124 / October, #125 / November, |
| 1979: | #128 / February, #129 / March, #132 / June, #134 / August, #135 / September, #136 / October, #137 / November, #138 / December, |
| 1980: | #139 /January, #140 / February, #143 / May, #144 / June, #146 / August, #148 / October, #149 / November, |
| 1981: | #153 / March, #155 / May, #156 / June, #157 / July, #158 / August, #159 / September, #160 / October, #161 / November, #162 / December, #252 / February, |
| 1982: | #163 / January, #164 / February, #166 / April, #167 / May, #168 / June, #170 / August, #171 / September, #172 / October, #174 / December, |
| 1983: | #175 / January, #177 / March, #178 / April, #179 / May, #180 / June, #182 / August, #183 / September, #184 / October, #185 / November, #186 / December, |
| 1984: | #190 / April, #191 / May, #193 / July, #194 / August, #197 / November, #198 / December, |
| 1985: | #199 / January, #200 / , #202 / April, #203-4 / May/June, #205 / July, #206 / August, #207 / , #208 / October, #210 / December, |
| 1986: | #211 / January, #212 / February, #213 / March, #215 / May, #216 / June, #218 / August, |
| 1987: | #228 /June, #229-30 / July, #232-3 / , #234 / , |
| 1988: | #236 / February, #237 /March, #238 / April, #241 / July, #242 / August, #243 /September, #244 / October, #246 / December, |
| 1989: | #248 / February, #250 / April, #254 /August, #255 / September, #257 / November, #258 / December, |
