Παραπομπή APA

United Nations Industrial Development Organization. (1972). The manufacture and utilizatin of portland cement. New York: United Nations.

Παραπομπή Chicago Style

United Nations Industrial Development Organization. The Manufacture and Utilizatin of Portland Cement. New York: United Nations, 1972.

Παραπομπή MLA

United Nations Industrial Development Organization. The Manufacture and Utilizatin of Portland Cement. New York: United Nations, 1972.

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