Soil conservation. assessing the national resources inventory / Vol. 1 :

Bibliográfalaš dieđut
Searvvušdahkki:	National Research Council (U.S.). Board on Agriculture. Committee on Conservation Needs and Opportunities
Materiálatiipa:	Licensed eBooks
Giella:	eaŋgalasgiella
Almmustuhtton:	Washington, D.C. : National Academy Press, 1986.
Liŋkkat:	https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&AN=15903

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