| Covers listed |
|
| 1948: | #1 /November, |
| 1949: | #2 /January, #3 /March, #4 / May, #5 /July, September, November, |
| 1950: | January, March, Vol 2 # 4May, June, July, August, September, October, November, December, |
| 1951: | February, March, April, May, June, July, August, September, November, December, |
| 1952: | January, February, March, April, May, June, July, September, October, November, December, |
| 1953: | January, February, March, May, July, August, September, October, November, December, |
| 1954: | January, February, March, April, May, June, July, August, September, November, December, |
| 1955: | January, February, March, April, May, June, August, September, October, November, December, |
| 1956: | January, February, March, April, June, July, August, September, October, November, December, |
| 1957: | January, February, March, April, May, June, July, August, September, October, December, |
| 1958: | February, March, April, July, September, November, December, Annual , |
| 1959: | Vol 11 # 1 January, Vol 11 No 2 February, March, April, June, August, September, October, November, December, |
| 1965: | March, Vol 1 # 7 May, July, September, Vol 1 No 11 October, November, |
| 1966: | Vol 2 No 5 January, Vol 2 No 6 February, Vol 2 No 7 March, Vol 2 No 8 April, Vol 2 No 9 May, Vol 2 No 10 June, Vol 2 No 11 August, Vol 3 # 1 November, Vol 3 # 2 December, |
| 1967: | Vol 3 No 3 January, Vol 3 No 5 March, Vol 3 No 6 April, Vol 3 No 8 June, Vol 3 No 9 July, Vol 3 No 11 , Vol 3 No 12 October, Vol 4 # 2December, |
| 1968: | Vol 4 No 5 March, Vol 4 No 6 April, #55 / June, #56 / July, #61 / December, |
| 1969: | #62 / January, March, #68 / July, #69 / August, #70 / September, |
| 1970: | #74 / January, #77 / April, #84 / November, December, |
| 1971: | Vol 25 No 1 January, March, August, September, December, |
| 1972: | February, March, May, June, August, September, October, November, December, |
| 1973: | January, February, March, April, May, June, July, August, October, December, |
| 1974: | January, Vol 24 No 4 April, May, Vol 24 # 7 July, Vol 24 No 8 August, October, |
| 1975: | February, April, Summer, Vol 25 No 7 July, August, September, October, November, |
| 1976: | February, March, June, August, October, |
| 1977: | Vol 27 No 1 January, May, September, |
| 1978: | Vol 28 No 3 May, September, November, |
| 1979: | Vol 29 No 2 March, Vol 29 No 4 April, May, Vol 29 No 7 July, Vol 29 No 8 August, October, November, |
| 1980: | Vol 30 No 1 January, Vol 30 No 4 June, October, |
