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Cilt sonuçları
Environmental aspects of natural resource management
Raymond J. Penn · Production Economics and Farm Management Service, Agricultural Services Division, Food and Agriculture Organization of the United Nations
39 sayfa · 1972
Conservation of natural resources / Agriculture / Environmental policy
La Reforma agraria de Venezuela
Raymond J. Penn · Unión Panamericana, Secretaría General, Organización de los Estados Americanos
39 sayfa · 1963
Land reform / Venezuela / Law and legislation
Rural zoning in Wisconsin
Walter A. Rowlands, Fred B. Trenk, Raymond J. Penn, University of Wisconsin. Agricultural Experiment Station · Wisconsin Agricultural experiment station
32 sayfa · 1948
Zoning
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