Παραπομπή APA

(1978). Agronomic - economic research on soils of the tropics. Annual report for 1976 - 1977. USA: U.S.Agency for International Development.

Παραπομπή Chicago Style

Agronomic - Economic Research On Soils of the Tropics. Annual Report for 1976 - 1977. USA: U.S.Agency for International Development, 1978.

Παραπομπή MLA

Agronomic - Economic Research On Soils of the Tropics. Annual Report for 1976 - 1977. USA: U.S.Agency for International Development, 1978.

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