| Covers listed | |
| 1932: | May, June, July, August, September, October, November, December, |
| 1933: | January, February, March, April, June, August, September, October, November, December, |
| 1934: | April, May, June, July, October, |
| 1935: | February, October, November, December, |
| 1936: | January, April, June, September, |
| 1937: | January, |
| 1938: | March, July, August, |
| 1939: | January, 1 April, 15 April, 1 May, 15 May, June, |
| 1940: | December, |
