62
Published 1990
American Chemical Society

63
Published 1991
American Chemical Society

65
Published 1991
American Chemical Society

66
Published 1991
American Chemical Society

67
Published 1991
American Chemical Society

68
Published 1991
American Chemical Society

69
Published 1992
American Chemical Society

70
Published 1992
American Chemical Society

71
Published 1992
American Chemical Society

72
Published 1992
American Chemical Society

75
Published 1993
American Chemical Society

76
Published 1993
American Chemical Society

77
Published 1993
American Chemical Society

79
Published 1994
American Chemical Society

80
Published 1994
American Chemical Society