Cinquante ans de recherches," ماسون & سي أي إي بباريس 1949* Consultative Group on International Agricultural Research (CGIAR)* Agricultural Research Service* Indian Council of Agricultural Research* International Institute of Tropical Agriculture* International Livestock Research Institute* The National Agricultural Library (NAL) - The most comprehensive agricultural library in the world.
Cinquante ans de recherches," Masson & c.ie, Paris 1949==References====External links==* Consultative Group on International Agricultural Research (CGIAR)* Agricultural Research Service* Indian Council of Agricultural Research* International Institute of Tropical Agriculture* International Livestock Research Institute* The National Agricultural Library (NAL) - The most comprehensive agricultural library in the world.