| Covers listed |
|
| 1950: | #1 Vol 1 # 1/April, Vol 1 # 2Summer, Vol 1 # 3Fall, |
| 1951: | Vol 2 # 1Spring, Vol 2 # 2September, Vol 2 # 3November, |
| 1953: | June, August, September, November, December, |
| 1954: | January, March, May, June, August, |
| 1955: | December, |
| 1956: | October, |
| 1957: | June, December, |
| 1958: | April, June, Vol 6 # 4 August, October, |
| 1959: | February, June, July, August, September, October, November, |
| 1960: | January, March, May, July, Vol 8 # 5October, |
| 1963: | June, Vol 10September, December, |
| 1964: | March, June, |
| 1967: | September, October, |
| 1968: | February, March, April, May, June, July, October, |
| 1969: | January, February, April, June, September, October, December, |
| 1970: | March, April, June, November, December, |
| 1971: | March, May, September, November, |
