• July 1976

  Vol 13 No 3 (1976)
• October 1976

  Vol 13 No 4 (1976)
• January 1977

  Vol 14 No 1 (1977)
• April 1977

  Vol 14 No 2 (1977)
• July 1977

  Vol 14 No 3 (1977)
• October 1977

  Vol 14 No 4 (1977)
• January 1978

  Vol 15 No 1 (1978)
• April 1978

  Vol 15 No 2 (1978)
• July 1978

  Vol 15 No 3 (1978)
• October 1978

  Vol 15 No 4 (1978)
• January 1979

  Vol 16 No 1 (1979)
• April 1979

  Vol 16 No 2 (1979)
• July 1979

  Vol 16 No 3 (1979)
• October 1979

  Vol 16 No 4 (1979)
• January 1980

  Vol 17 No 1 (1980)
• April 1980

  Vol 17 No 2 (1980)
• July 1980

  Vol 17 No 3 (1980)
• October 1980

  Vol 17 No 4 (1980)
• January 1981

  Vol 18 No 1 (1981)
• April 1981

  Vol 18 No 2 (1981)
• July 1981

  Vol 18 No 3 (1981)
• October 1981

  Vol 18 No 4 (1981)
• January 1982

  Vol 19 No 1 (1982)
• April 1982

  Vol 19 No 2 (1982)
• July 1982

  Vol 19 No 3 (1982)