The Rise of the American Cottonseed Oil Industry H. C. Nixon Journal of Political Economy 1930 38(1), 73-85
The New Conception of the "Standard of Value" W. C. Schluter Journal of Political Economy 1930 38(5), 600-608
A Mathematical Theory of Price and Production Fluctuations and Economic Crises C. F. Roos Journal of Political Economy 1930 38(5), 501-522