| Covers listed | |
| 1949: | #4 /April, |
| 1950: | January, |
| 1951: | #4 /April, |
| 1955: | 1 January, |
| 1960: | Annual , #2 / , |
| 1961: | Annual , |
| 1962: | #6 , |
| 1964: | March, May, June, July, |
| 1965: | #1 / January/February, #2 / March/April, Annual , |
| 1966: | Annual , |
| 1967: | #6 German? cover, |
| 1968: | #1 / January, |
