| Covers listed | |
| 1940: | May, |
| 1941: | November, |
| 1942: | October, |
| 1944: | June, |
| 1945: | March, April, December, |
| 1958: | November, |
| 1964: | August, December, |
| 1965: | March, June, July, October, December, |
| 1966: | January, March, May, June, September, |
| 1967: | March, April, May, June, |
| 1968: | January, August, November, |
| 1970: | January, April, June, |
| 1971: | March, |
