Food and Agriculture Organization of the United Nations. (1952). Soil conservation: An intertnational study. Food and Agriculture Organization.
Lua i Stíl Chicago (17ú heag.)Food and Agriculture Organization of the United Nations. Soil Conservation: An Intertnational Study. United Nations: Food and Agriculture Organization, 1952.
Lua MLA (9ú heag.)Food and Agriculture Organization of the United Nations. Soil Conservation: An Intertnational Study. Food and Agriculture Organization, 1952.
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