Issue 1:
July 1971

Issue 2
Aug/Sep 1971

Issue 3
Sep/Oct 1971

Issue 4
Nov/Dec 1971

Issue 5
Dec 1971/Jan 1972

'Special supplement'
Jan 17, 1972

Issue 6
Feb/Mar 1972

Issue 7
April 1972

Issue 8
June 1972

'Special supplement'
July 25, 1972

Issue 9
July/Aug 1972

Issue 10
Sep/Oct 1972

Issue 11
December 1972

Issue 12
March 1973

Issue 13
June/July 1973

Issue 14
Oct/Nov 1973

Issue 15
May 1974

Issue 16
September 1974

Issue 17
November 1974

Issue 18
Feb/March 1975

Issue 19
May/June 1975

Issue 20
September 1975

Issue 21
November 1975

Issue 22
December 1975

Issue 23
January 1976

Issue 24
February 1976

Issue 25
March 1976

Issue 26
Apr/May 1976

Issue 27
June 1976

Issue 28
July/Aug 1976

Issue 29
Sep/Oct 1976

Issue 30
Dec 1976/Jan 1977

Issue 31
April 1977