61
by Shirley
Published 1975
62
by Tang
Published 1993
63
by Garson
Published 1992
64
by Hagenaars
Published 1993
65
by Jaccard
Published 1990
66
by Hagle
Published 1996
67
by Gibbons
Published 1993
68
by Toothaker
Published 1993
69
by Mooney
Published 1997
70
by Menard
Published 1995
71
by Sayrs
Published 1989
72
by Klockars
Published 1986
73
by Fering
74
by Bray
Published 1985
75
by Ignizio
Published 1985
76
by Long
Published 1983
77
by Lewis-beck
Published 1980
78
by Iversen
Published 1996
79
by Hagle
Published 1995
80
by Fax
Published 1991