Volume 26 :  5 January 1976 – 6 December 1976

• Vol. 26, Complete (5 January 1976 – 6 December 1976)

Volume 27 :  10 December 1978 – 18 December 1978

• Vol. 27, Complete (10 January 1977 – 21 December 1977)

Volume 28 :  9 January 1978 – 18 December 1978

• Vol. 28, Complete (9 January 1978 – 18 December 1978)

Volume 29 :  Missing

Volume 30 :  Missing

Volume 31 :  5 January 1981 – 7 December 1981

• Vol. 31, Complete (5 January 1981 – 7 December 1981)

Volume 32 :  4 January 1982 – 13 December 1982

• Vol. 32, Complete (4 January 1982 – 13 December 1982)

Volume 33 :  10 January 1983 – 12 December 1983

• Vol. 33, Complete (10 January 1983 – 12 December 1983)

Volume 34 :  5 January 1984 – 19 December 1984

• Vol. 34, Complete (5 January 1984 – 19 December 1984)

Volume 35 :  28 January 1985 – 9 December 1985

• Vol. 35, Complete (28 January 1985 – 9 December 1985)

Volume 36 :  13 January 1986 – 22 December 1986

• Vol. 36, Complete (13 January 1986 – 22 December 1986)

Volume 37 :  5 January 1987 – 14 December 1987

• Vol. 37, Complete (5 January 1987 – 14 December 1987)

Volume 38 :  4 January 1988 – 21 December 1988

• Vol. 38, Complete (4 January 1988 – 21 December 1988)

Volume 39 :   9 January 1989 – 16 December 1989

• Vol. 39, Complete (9 January 1989 – 16 December 1989)

Volume 40:  2 January 1990 – 19 December 1990

• Vol. 40, Part 1 (2 January 1990 – 19 December 1990)
• Vol. 40, Part 2 (2 January 1990 – 19 December 1990)