Copy:
(Nov-dec 1971
Mar-Nov 1972
1973-Oct 1974
Mar 1975-May 1976
Sep. Nov-Dec 1976
Feb-Dec 1977
Jan/Feb-Apr, Jun-Aug, Dec 1978
Feb. Apr-May, Sep-Nov 1979
Mar, Jun-Dec 1980
Feb-Dec 1981
Sep, Nov 1982
1983-Aug 1984
Oct-Dec 1984)
(Mar-Apr 1985
May-Jun, Nov-Dec 1986
Sep-Nov 1987
Feb-May, Sep-Dec 1988
Feb, Jul/Aug, Oct 1989
Jan-May, Jul/Aug, Nov-Dec 1990
Jan-Nov 1991
Mar-Aug, Oct-Dec 1992
Jan-Nov 1993
Feb 1998)