#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