41
Published 1967
42
by Harris, Stuart, 1931-
Published 1983
43
by Haggard, Stephan
Published 1995
44
Published 1979
45
Published 1990
46
47
Published 1969
48
49
by Agarwala, A. N, 1917-
Published 1958
50
by Pryor, Frederic L.
Published 1990
51
by Hope, Kempe Ronald
Published 1996
52
Published 1999
53
by Seitz, John L, 1931-
Published 2002
54
by Bairoch, Paul
Published 1975
55
by Moorsom, Richard
Published 1984
56
Published 1941
57
by Bhagawati, Jagdish N, 1934-
Published 1966
58
by Harris, Nigel
Published 1990
59
by Khor, Martin.
Published 2008
60
by Mahtaney, Piya
Published 2002