Historical Sources of U.S. Agricultural Productivity: Implications for R&D Policy and Social Science Research

Autor:	Bonnen, James T.
Zdroj:	American Journal of Agricultural Economics, 1983 Dec 01. 65(5), 958-966.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1240399 Zobrazit plný text záznamu