1
2
by Reynolds, Lloyd G.
Published 1986
3
by Seow, Francis T
Published 1994
4
Published 1963
5
6
7
by Kuznets, Simon
Published 1966
8
by Scheingold, Stuart A.
Published 1965
9
Published 1965
10
by Gottesman, Evan
Published 2003
11
by Hungtington, Samuel P.
Published 2006
12
by Habeck, Mary R.
Published 2006
13
by Jones, Owen Bennett
Published 2003
14
by Abernethy, David B.
Published 2000
15
Published 2005
16
by Roberts, Henry L.
Published 1951
17
by Alker, Hayward R.
Published 1965
18
by Rostow, Eugene Victor, 1913-
Published 1962
19
by Walker, Richard L, 1922-
Published 1955
20
by Doob, Leonard Williams, 1909-
Published 1961