Issue
- Volume 280:Issue 6215(1980)1
- Volume 284:Issue 6328(1982)1
- Volume 300:Issue 6727(1990)1
- Volume 34:Issue 8(1972)1
- Volume 37:Issue 12(1975)1
- Volume 38:Issue 8(1976)1
- Volume 41:Issue 5(1979)1
- Volume 43:Issue 2(1980)1
- Volume 47:Issue 4(1982)1
- Volume 49:Issue 6(1983)1
- Volume 53:Issue 6(1985)1
- Volume 55:Issue 4(1986)1
- Volume 56:Issue 1(1986)1
- Volume 60:Issue 3(1988)1
- Volume 63:Issue 1(1990)1
- Volume 68:Issue 7(1992)2
- Volume 83:Issue 6(2000)1
- Volume 86:Issue 3(2001)1