61
by Velte, Anthony T.
Published 2007
62
Published 1996
63
Published 1994
64
Published 1995
65
by Hsieh-Yee, Ingrid
Published 2000
66
by Crumlish, Christian
Published 1997
67
by Cohn, John M.
Published 2002
68
Published 1997
69
by Miller Michael, 1958-
Published 2007
70
Published 2005
71
Published 1995
72
Published 2002
73
74
Published 1997
75
Published 2003
76
by Ashworth, Wilfred
Published 1979
77
by Mansfield, Ron
Published 1997
78
by Forrester, William H.
Published 2000
79
by Buzek, Antony, 1921-
Published 1964
80
by Hughes, Lorna M.
Published 2004