Regional Differences in the Validity of the Concept of Innate Soil Productivity

Autor:	Gersmehl, Philip J., Brown, Dwight A.
Zdroj:	Annals of the Association of American Geographers, 1986 Dec 01. 76(4), 480-492.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/2562705 Zobrazit plný text záznamu