Παραπομπή APA

(1980). Agronomic - economic research on soils of the tropics. 1978-1979 Report. USA: U.S.Agency for International Development.

Παραπομπή Chicago Style

Agronomic - Economic Research On Soils of the Tropics. 1978-1979 Report. USA: U.S.Agency for International Development, 1980.

Παραπομπή MLA

Agronomic - Economic Research On Soils of the Tropics. 1978-1979 Report. USA: U.S.Agency for International Development, 1980.

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