41
by Jansen, G. H
Published 1979
42
by O'Reilly, Kenneth
Published 1989
43
by Goodman, David S. G, 1948-
Published 1994
44
Published 1993
45
by Marshall, Barbara, 1939-
Published 1997
46
by Roberts, J. M.
Published 1995
47
by Brown, Anthony Cave
Published 1975
48
49
by Brecher, Michael
Published 1959
50
by Osborne, Peter.
Published 1995
51
by Salisbury, Harrison E, 1908-
Published 1992
52
Published 1995
53
Published 1970
54
Published 2000
55
56
57
by Chi Hsin
Published 1978
58
by Alp, Ilker, 1953-
Published 1988
59
Published 1989
60
by Kriger, Norma J.
Published 1992