Planning and organization of fertilizer use development in Africa
Food and Agriculture Organization of the United Nations
Planning and organization of fertilizer use development in Africa - Rome FAO 1975 - 184 p. - No. 26; FAO, Soils Bulletin .
Planning and organization of fertilizer use development in Africa - Rome FAO 1975 - 184 p. - No. 26; FAO, Soils Bulletin .