#16, December 1980, 7 pages
#26, October 1981, 7 pages
#34, June 1982, 10 pages
#51, November 1983, 4
pages
#73, September 1985, 4
pages
#74, October 1985.
#95, July 1987, 4
pages
#109, September 1988
#116 April 1989
#127, March 1990
#137, January 1991
#150, February 1992
#157 September 1992
#164, April 1993, 9 pages
#180, August 1994, 7 pages
#189, May 1995, (back cover)
#201, May 1996, 10 pages
#218, October 1997
#250, June 2000
#261, May 2001
#272, April 2002, 12 pages
#291, November 2003
#334, March 2007, 10 pages
#346, February 2008, 14 pages
#381, November 2010, 11 pages
#415, June 2013, 9 pages
#436, January 2015, 7 pages.
#447, Dec 2015, 6 pages
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