61
Published 1989
American Chemical Society

62
Published 1990
American Chemical Society

63
Published 1991
American Chemical Society

64
Published 1992
American Chemical Society

65
Published 1992
American Chemical Society

67
Published 1993
American Chemical Society

68
Published 1993
American Chemical Society

69
Published 1993
American Chemical Society

70
Published 1993
American Chemical Society

72
Published 1994
American Chemical Society

73
Published 1994
American Chemical Society

74
Published 1994
American Chemical Society

76
Published 1994
American Chemical Society

77
Published 1994
American Chemical Society

78
Published 1995
American Chemical Society

79
Published 1995
American Chemical Society

80
Published 1995
American Chemical Society