China and America Against Soil Erosion: I. The Fate of Conservation in Northern Shansi

Autor:	Lowdermilk, W. C., Wickes, D. R.
Zdroj:	The Scientific Monthly, 1943 May 01. 56(5), 393-413.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/17802 Zobrazit plný text záznamu