| Covers listed |
|
| 1949: | Vol 3 No 6 September, Vol 3 No 7 October, Vol 3 No 8 November, Vol 3 No 9 December, |
| 1950: | Vol 3 No 10 January, Vol 3 No 11 February, Vol 4 No 1 April, Vol 4 No 2 May, Vol 4 No 3 June, Vol 4 No 4 July, Vol 4 No 5 August, Vol 4 No 6 September, |
| 1951: | Vol 5 No 9 December, |
| 1952: | Vol 6 No 1 April, |
| 1953: | Vol 6 No 10 January, Vol 7 No 6 September, Vol 7 No 8 November, |
| 1954: | Vol 8 No 4 July, Vol 8 No 5 August, Vol 8 No 9 December, |
| 1956: | Vol 10 No 8 November, |
| 1957: | Vol 10 No 10 January, |
| 1958: | Vol 12 No 8 November, |
| 1959: | Vol 13 No 3 June, Vol 13 No 6 September, Vol 13 No 8 November, |
| 1960: | Vol 13 No 12 March, Vol 14 No 2 May, Vol 14 No 5 August, September, November, |
| 1961: | January, March, April, Vol 15 No 2 May, August, Vol 15 No 7 October, Vol 15 No 8 November, |
| 1962: | Vol 15 No 11 February, Vol 15 No 12 March, Vol 16 # 1 April, Vol 16 # 3 June, Vol 16 # 4 July, Vol 16 No 5 August, September, Vol 16 No 7 October, November, Vol 16 No 9 December, |
| 1963: | March, April, May, Vol 17 No 3 June, July, August, Vol 17 No 8 November, |
| 1964: | Vol 17 No 11 February, Vol 17 No 12 March, Vol 18 # 1 April, Vol 18 No 2 May, Vol 18 # 3 June, Vol 18 No 4 July, August, September, December, |
| 1965: | January, Vol 17 No 12 March, April, October, Vol 19 No 8 November, |
| 1966: | Vol 19 No 10 January, February, Vol 20 No 2 May, July, August, September, Vol 19 No 9 November, |
| 1967: | January, Vol 21 No 1 April, May, June, July, August, September, October, November, |
| 1968: | January, February, March, Vol 22 No 1 April, May, June, July, Vol 22 No 5 August, September, October, Vol 22 No 8 November, |
| 1969: | January, February, March, April/May, June, July, August, September, October, November, December, |
| 1970: | January, February, March, March, April, May, June, July, August, September, October/November, December, |
| 1971: | January, Vol 24 No 10 February, March/April, May/June, July/August, September/October, November/December, |
| 1972: | January/February, |
