| Covers listed |
|
| 1952: | #1 Vol 1 No 1/December 1952 / Jan-Feb 1953, |
| 1953: | Vol 1 # 2March/April/May, Vol 1 # 3June/July, Vol 1 # 4August/September/October, Vol 1 # 5November/December, |
| 1954: | January/February, March/April, 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, July/August, September/October, November/December, |
| 1957: | Vol 4 # 6January/February, March/April, May/June, July/August, September/October, November/December, |
| 1958: | January/February, April/May, June/July, August/September, October/November, December, |
| 1959: | February/March, April/May, June/July, August, September, October, 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, June, 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, August, September, October, November, December, |
| 1968: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1969: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1970: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1971: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1972: | January, February, March, April, May, June, July, August, September, October, November, December, |
| 1973: | January, February, March, April, May, June, July, August, |
| 1988: | April, June, August, |
| 1992: | August, |
