| Covers listed |
|
| 1931: | #1 /November, #2 /December, |
| 1932: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1933: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1934: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1935: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1936: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1937: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1938: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1939: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1940: | January, February, March, April, May, June, July, August, September, October, November, December, |
