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International Plant Genetic Resources Institute ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 114, June 1998] ,  Plant Genetic Resources Newsletter: No. 114, June 1998

International Plant Genetic Resources Institute ,  [Bulletin pour l'Afrique Subsaharienne: No. 13 Mai 2000] ,  Bulletin pour l'Afrique Subsaharienne: No. 13 Mai 2000

International Plant Genetic Resources Institute ,  [Bulletin pour l'Afrique Subsaharienne: No. 12 Décembre 1999] ,  Bulletin pour l'Afrique Subsaharienne: No. 12 Décembre 1999

International Plant Genetic Resources Institute ,  [Newsletter for Sub-Saharan Africa: No. 13 May 2000] ,  Newsletter for Sub-Saharan Africa: No. 13 May 2000

Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 30, June 1973] ,  Plant Genetic Resources Newsletter: No. 30, June 1973

International Plant Genetic Resources Institute ,  [Newsletter for Asia, the Pacific and Oceania: No. 31, January-April 2000] ,  Newsletter for Asia, the Pacific and Oceania: No. 31, January-April 2000

International Board for Plant Genetic Resources ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 38, June 1979] ,  Plant Genetic Resources Newsletter: No. 38, June 1979

International Plant Genetic Resources Institute ,  [Newsletter for the Americas: Volume 6, No.1, July 2000] ,  Newsletter for the Americas: Volume 6, No.1, July 2000

International Plant Genetic Resources Institute ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 123, September 2000] ,  Plant Genetic Resources Newsletter: No. 123, September 2000

Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 28, August 1972] ,  Plant Genetic Resources Newsletter: No. 28, August 1972