61
by Erasmus, Udo
Published 2003
62
Published 2011
63
by Thompson, Janice
Published 2005
64
65
by Zhang, Wei Jun
Published 2010
66
by Goo, Chui Hoong
Published 2014
67
Published 1976
68
by Rubin, Jacqueline
Published 2008
69
70
71
by Cohen, Stanley A.
Published 1982
72
Published 2006
73
by Williams, Melvin H.
Published 2005
74
by Lin, Sheng Qin
Published 2007
75
by Shulman, Joey
Published 2003
76
by Murray, Michael T.
Published 1993
77
by Brewer, Sarah
Published 2002
78
Published 2004
79
80
by Hu, Long Cai
Published 2004