Boulding, K.E. (August 1947). "Economic Analysis and Agricultural Policy". Canadian Journal of Economics and Political Science. 3. 13 (3): 439–440. doi:10.2307/137769. JSTOR137769.
Bean, L.H.; P.H. Bollinger (Feb 1939). "The Base Period for Parity Prices". Journal of Farm Economics. 21 (1): 253. doi:10.2307/1230643. JSTOR1230643.
jstor.org
Boulding, K.E. (August 1947). "Economic Analysis and Agricultural Policy". Canadian Journal of Economics and Political Science. 3. 13 (3): 439–440. doi:10.2307/137769. JSTOR137769.
Bean, L.H.; P.H. Bollinger (Feb 1939). "The Base Period for Parity Prices". Journal of Farm Economics. 21 (1): 253. doi:10.2307/1230643. JSTOR1230643.
Fausold, Martin (April 1977). "President Hoover's Farm Policies 1929-1933". Agricultural History. 51 (2): 372. JSTOR3741165.