| Covers listed |
|
| 1937: | #1 /31 January, #2 /28 February, #3 /31 March, #4 /April, #5 /May, #6 /June, #7/8 /July/August, #9 /September, #10 /October, #11 /November, #12 /December, |
| 1938: | January, February/March, #4 /April, May, June, July, August, September, October, November, December, |
| 1939: | January, February, March, May, June, July, September, October, November, December, |
| 1940: | January, February, March, April, May, June, July/August, September, |
| 1941: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1942: | January, February, March, May/July, August, November/December, |
| 1943: | January, May, |
| 1948: | March, April, May, June, July, August, September, October, November, December, |
| 1949: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1950: | February, March, April, May/June, July, August/September, November, December, |
| 1951: | April, |
| 1952: | January, February, March, April, May/June, September/October, November, December, |
| 1953: | #1 / January, #2 / February, #3 /March, #4-5 /April/May, #6 / June, #7 / July, #8-9 /August/September, #10 /October, #11 / November, #12 /December, |
| 1954: | January, February/March, May, June, July, August, September/October, November/December, |
| 1955: | January/February, March, April, May, June, July, August, September/October, November, December, |
| 1956: | January, February, March, April, May/June, June, July, August/September, October, |
| 1957: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1958: | January, February, March, April, May, June, July, August, September, October/November, December, |
| 1959: | January, February/March, Vol 20 # 4April, May, June, July, August/September, November, December, |
| 1960: | January/February, March/April, May/June, July, August/September, October/November, December, |
| 1961: | January, February/March, April/May, June, July/August, September, October, November/December, |
| 1962: | January, February, March, April, May, June, July/August, September/October, November, December, |
| 1963: | January/February, March, April, May, July/August, September/October, November, December, |
| 1964: | January, February, March, April/May, June, July, August/September, October, November/December, |
| 1965: | January, February, March, April, May/June, July/August, September, October/November, December, |
| 1966: | January/February, March, April, May, June, July/August, September/October, November, December, |
| 1967: | January, February, March/April, May, June, July/September, October/December, |
| 1968: | January/February, March/April, May/June, July/August, September-October, November/December, |
| 1969: | March/April, May/June, July/August, September/October, November/December, |
| 1970: | January/April, May-June, #7-8 /July/August, September/October, November/December, |
| 1971: | January/February, March/April, May/June, July/August, |
| 1972: | March/April, |
| 1973: | May/June, |
| 1974: | March/April, |
| 1975: | January/April, #9-12 / , |
| 1976: | September/December, |
| 1977: | #5-6 / , |
| 1978: | #1 / January/February, #2 / March/April, #3 / May/June, #4 / July/August, #5-6 / September/December, |
| 1979: | #2 / March/April, #3 / , #5-6 / , |
| 1980: | April-June, |
| 1983: | #1 , #11 , |
| 1984: | October/December, |
| 1985: | January/March, July/September, October/December, |
| 1987: | #1 / , #3 / , |
| 1988: | #2 / , |
| 1996: | #3-4 , #1-2 / , |
| 1997: | January/February, |
| 2000: | #1-2 / , |
| 2005: | #552 / February, |
| 2007: | #558 / , |
| 2015: | #582-3 / , #588-9 / , |
| 2018: | #590 / , #591 / , |
| 2019: | #592 / , #593 / , |
| 2020: | #596 / , #598 / , #599 / , #600 / , #601 / , #602 / , #603 / , #605 / , |
| 2021: | March, |
