Number 1, 1974 (out of print, download available)

Number 3, 1976 (published 1977) (out of print, download available)

Number 5, 1978 (published 1980) (out of print, download available)

Number 7, 1980 (published 1981) (out of print, download available)

Number 9, 1982 (published 1984)

Number 11, 1984 (published 1987)

Number 13, 1986 (published 1990)

Number 15, 1988 (published 1992)

Number 17, 1990 (published 1994)

Number 19, 1992

Number 21, 1994 (published 1996)

Number 23, 1996 (published 1999)

Number 25, 1998 (published 2003)

Number 27, 2000 (published 2006)

Number 29, 2002 (published 2010)

Number 31, 2004 (published 2010)

Number 33, 2006 (published 2011)

Number 35, 2008 (published 2012)

Number 37, 2010 (published 2014)

Number 39, 2012 (published 2015)

Number 41, 2014 (published 2017)

Number 43, 2016 (published 2017)