Vol 82, 2002 Volume 81, 2001 Vol 80, 2000 Vol 79, 1999 Vol 78, 1998 Vol 77, 1998 Vol 76, 1997 Vol 75, 1997 Vol 74, 1996 Vol 73, 1996 Vol 72, 1995 Vol 71, 1995 Vol 70, 1994 Vol 69, 1994 Vol 68, 1993 Vol 67, 1993 Vol 66, 1992 Vol 65, 1992 Vol 64, 1991 Vol 63, 1991 Vol 62, 1990 Vol 61, 1990 Vol 60, 1989 Vol 59, 1989 Vol 58, 1988 Vol 57, 1988 Vol 56, 1987 Vol 55, 1987 Vol 54, 1986 Vol 53, 1986 Vol 52, 1985 Vol 51, 1985 Vol 50, 1984 Vol 49, 1984 Vol 48, 1983 Vol 47, 1983 Vol 46, 1982 Vol 45, 1982 Vol 44, 1981 Vol 43, 1981 Vol 42, 1980 Vol 41, 1980 Vol 40, 1979 Vol 39, 1979 Vol 38, 1978 Vol 37, 1978