41
by Buss
Published 1964
42
by Allen
Published 1976
43
Published 1993
44
by Brown
Published 2003
45
Published 2006
46
Published 2001
47
Published 2002
48
by Sasha Bashir 1980-
Published 2009
49
by Ziegler, Oswald Leopold
Published 1972
50
Published 2010
51
Published 2000
52