//-->
Die wirtschaftliche Grundlage der Politik
Beard, Charles Austin, (1949)
The Idea of national interest : an analytical study in American foreign policy
Beard, Charles Austin, (1934)
Essays on research in the social sciences : papers presented in a general seminar conducted by the Committee on Training of The Brookings Institution, 1930-31
Swann, W. F. G., (1931)