| Covers listed | |
| 1968: | Vol 2 # 3, Vol 2 # 4, |
| 1969: | Vol 2 # 5January/February, Vol 3 # 1, Vol 3 # 2June/July, Vol 3 # 3, Vol 3 # 4, Annual , |
| 1970: | Vol 3 No 5 February/March, Vol 4 # 1, Annual, |
| 1971: | Vol 5 # 1, Vol 5 # 3, Vol 5 # 5, Annual , |
| 1973: | Vol 6 # 1, |
