1
by Riggs, Fred Warren
Published 1964
2
by McCord, William, 1930-
Published 1965
3
by Starling, Grover
Published 1982
4
Published 1962
5
Published 1963
6
Published 1989
7
by Garang, John, 1945-
Published 1992
8
9
by Von der Mehden, Fred R.
Published 1964
10
Published 1960
11
Published 1978
12
13
by Holmes, Jack E.
Published 1994
14
by Oakes, John B.
Published 1961
15
Published 1984
16
Published 1965
17
by Halley, Laurence
Published 1985
18
Published 1994
19
by Ripley, Randall B.
Published 1989
20
Published 1994