1
by Vali, Ferenc A, 1905-
Published 1976
2
by Brewster, R. Wallace
Published 1963
3
by Kessler, Clive S, 1942-
Published 1978
4
by Kennedy, Gavin.
Published 1974
5
Published 1984
6
Published 1975
7
by Clunies Ross, A. I, 1932-
Published 1973
8
Published 1980
9
by Starling, Grover
Published 1982
10
Published 1962
11
Published 1989
12
by Garang, John, 1945-
Published 1992
13
14
by Herson, Lawrence J. R.
Published 1984
15
Published 1978
16
17
by Holmes, Jack E.
Published 1994
18
by Moorsom, Richard
Published 1984
19
by Puthucheary, M. C
Published 1978
20
by Mehden, Fred R. Von Der
Published 1980