| Covers listed | |
| 1968: | #1 /November/December, |
| 1969: | #2 Vol 1 # 2/January/February, #3 Vol 1 # 3/March/April, #4 Vol 1 # 4, #5 Vol 1 # 5/July/August, |
| 1970: | #6 Vol 1 # 6, #7 , #8 , #9 , #10 Vol 2 # 2, #11 Vol 2 # 3, |
| 1971: | #12 Vol 2 # 4, #13 , |
| 1972: | #14 , |
| 1973: | #15 , #16 Vol 3 # 4, |
| 1974: | #17 , #18 , |
