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richard a levins
6 cilt bulundu.
Cilt sonuçları
Willard Cochrane and the American Family Farm (Our Sustainable Future)
Richard A. Levins · University of Nebraska Press
96 sayfa · 2000
Government policy / Farmers / Agricultural subsidies / Agriculture and state / Economic conditions
Disease in evolution
Wilson, Mary E., Richard Levins, Mary E. Wilson, Spielman A. · New York Academy of Sciences
503 sayfa · 1994
Evolution / Transmission / Epidemiology / Medical geography / Congresses
Agricultural computer programming
Richard A. Levins · Prentice-Hall
147 sayfa · 1984
Agriculture / Data processing / Farm management / Microcomputers / Programming
An analysis of the national coal economy and a marginal producing region, 1976-1990
Richard A. Levins · Center for Agricultural and Rural Development, Iowa State University
123 sayfa · 1976
Coal trade / Coal mines and mining