Dyfyniad APA

Valdes,Alberto. (1979). Economics and the design of small-farmer technology. Lowa State University Press.

Dyfyniad Arddull Chicago

Valdes,Alberto. Economics and the Design of Small-farmer Technology. IOWA: Lowa State University Press, 1979.

Dyfyniad MLA

Valdes,Alberto. Economics and the Design of Small-farmer Technology. Lowa State University Press, 1979.

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