| Covers listed |
|
| 1968: | #2 , #4 , #6 /September, #7 , #10 , #11 /December, |
| 1969: | #13 , #17 , #19 /April, #20 , #22 , #25 , #27 , #30 , #34 , |
| 1970: | #36 /January, #37 , #38 /February, #40 /March, #42 , #43 , #44 , #45 /May, #46 , #49 , #50 , #51 , #52 , #53 , #54 , #55 , #56 , #57 , #58 , #59 , #61 , #62 , |
| 1971: | #63 , #64 , #65 , #66 , #67 , #69 , #70 , #73 , #75 , #77 , #78 , |
| 1972: | #2 / , #3 , #5 , #6 , #10 / , #11 , #13 , #14 , #15 , #19 , #22 / , |
| 1973: | #1 , #3 , #4 , #5 , #15 , |
| 1974: | #32 / , #39 / , #41 , #44 / , |
| 1975: | #49 / , #54 / , #59 , #62 , #63 , #64 , #65 , #66 , #67 , #68 , #69 , #70 , #71 , #72 , |
| 1976: | #73 , #74 , #75 / , #77 / , #78 , #79 , #80 , #81 , #82 / , #89 , |
| 1977: | #104 , #114 , #116 / , |
| 1978: | #126 / , #127 / , #128 , #130 / , #132 / , #135 / , #138 , #139 , #140 , |
| 1979: | #151 , #152 / , #153 , #154 / , #155 / , |
| 1980: | #160 / , #170 , #179 / , |
| 1981: | #182 / , #183 / , #184 / , #185 / , #186 / , |
| 1993: | #363 /11 March, |
