Παραπομπή APA

(1991). Booker tropical soil manual: A hand book for soil survey and agricultural land evaluation in the tropics and Subtropics. New York: Longman Scientific &​ Technical.

Παραπομπή Chicago Style

Booker Tropical Soil Manual: A Hand Book for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. New York: Longman Scientific &​ Technical, 1991.

Παραπομπή MLA

Booker Tropical Soil Manual: A Hand Book for Soil Survey and Agricultural Land Evaluation in the Tropics and Subtropics. New York: Longman Scientific &​ Technical, 1991.

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