| Covers listed | |
| 1969: | #1 , |
| 1973: | November, |
| 1974: | Vol 6 No 1 January, March, April, May, July, November, |
| 1975: | Vol 7 #1January, February, March, Vol 7 No 5 May, Vol 7 No 6 June, |
| 1976: | March, #63 /April, #64 / May, #67 /August, #68 / September, #69 /October, #70 /November, |
| 1977: | #73 /February, #74 /March, #75 /April, #76 / May, #78 /September, |
