| Covers listed | |
| 1964: | May, June, July, August, September, |
| 1965: | January, April, July, August, September, October, |
| 1966: | February, March, April, Vol 9 # 5May, June, September, Vol 9 # 10October, November, Vol 9 # 12December, |
| 1967: | Vol 10 # 1January, Vol 10 # 2February, |
