| Covers listed |
|
| 1981: | #2 Vol 1 # 2/Winter, |
| 1982: | Vol 2 No 3Summer, Vol 3 # 1Fall, Vol 4 # 2Winter, Vol 4 # 3Winter, |
| 1983: | Vol 5 No 2Spring, Vol 5 # 3Spring, Vol 6 No 1Summer, Vol 7 No 2Fall, |
| 1984: | Vol 9 # 1, Vol 1 # 1 February, Vol 1 # 2 April, Vol 1 # 4 August, Vol 1 # 5 October, December, Special, |
| 1985: | Vol 2 # 1February, Vol 2 # 2 April/May, Vol 2 No 3June, Vol 2 No 4August, Vol 2 No 6 December, |
| 1986: | Vol 3 No 1February, Vol 3 # 4August/September, |
| 1987: | Vol 4 No 2April/May, Vol 4 No 3June/July, December 1987/ January 1988, |
| 1988: | February/March, Vol 5 No 2 April/May, June/July, Vol 5 # 4 August/September, Vol 5 # 5October/November, Vol 5 # 6December, |
| 1989: | Vol 6 # 1February/March, April/May, June/July, Vol 6 # 5October/November, |
| 1990: | April/May, Vol 7 No 3June, August/September, Vol 7 No 6October/November, Vol 7 No 7December 1990/January 1991, |
| 1991: | Vol 8 No 1February/March, October/November, Vol 8 No 7December 1991/January 1992, |
| 1992: | March, Vol 9 No 4July, |
| 1993: | Vol 10 No 3June, Vol 10 No 5August/September, |
| 1994: | Vol 11 No 2April/May, June, July, Vol 11 No 5August, Vol 11 No 6October, Vol 11 No 7November, Vol 11 No 8December 1994/January 1995, |
| 1995: | February, Vol 12 No 2March/April, May/June, Vol 12 No 6September/October, Vol 12 No 7November, Vol 12 No 8December 1995/January 1996, |
| 1996: | July, Vol 13 No 6October, Vol 13 No 7November, Vol 13 No 8December 1996/January 1997, |
| 1997: | Vol 14 No 1February, April, Vol 14 No 3June, Vol 14 No 4July, Vol 14 No 7November, Vol 14 No 8December, |
| 1998: | March, Vol 15 No 3April/May, Vol 15 No 4June, October, Vol 15 No 8November, |
| 1999: | Vol 16 No 1February, June, July, October, November, December, |
| 2000: | Vol 17 No 1February, Vol 17 No 2March, Vol 17 No 3April/May, Vol 17 No 4June, |
| 2001: | March, Vol 18 No 5July, Vol 18 No 6September, Vol 18 No 5November, December, |
| 2002: | May/June, September, October, |
| 2003: | February, March, July, September, October, November, December, |
| 2004: | February, March, April, June, July, September, November, December, |
| 2005: | February, March, April, June, July/August, September, October, November, December, |
| 2006: | February, March, June, July/August, September, October, December, |
| 2007: | April, May-June, July-August, September, October, November, December, |
| 2008: | February, March/April, May-June, July/August, September, October, November-December, |
| 2009: | February-March, SpecialMarch, March-April, May/June, July/August, September, October/November, December, |
| 2010: | March/April, May/June, July/August, September, October/November, December, |
| 2011: | March/April, May/June, July/August, September/October, November-December, |
| 2012: | March/April, May/June, September, November/December, |
| 2013: | April, July/August, September-October, December-January, |
