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

International Plant Genetic Resources Institute ,  [Newsletter for Asia, the Pacific and Oceania: No. 32, May-August 2000] ,  Newsletter for Asia, the Pacific and Oceania: No. 32, May-August 2000

Food and Agriculture Organization of the United Nations ,  Bioversity International ,  [Plant Genetic Resources Newsletter: No. 103, September 1995] ,  Plant Genetic Resources Newsletter: No. 103, September 1995

International Board for Plant Genetic Resources ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 34, June 1978] ,  Plant Genetic Resources Newsletter: No. 34, June 1978

International Plant Genetic Resources Institute ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 121, March 2000] ,  Plant Genetic Resources Newsletter: No. 121, March 2000

International Board for Plant Genetic Resources ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 33, February 1978] ,  Plant Genetic Resources Newsletter: No. 33, February 1978

International Plant Genetic Resources Institute ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 120, December 1999] ,  Plant Genetic Resources Newsletter: No. 120, December 1999

International Plant Genetic Resources Institute ,  Food and Agriculture Organization of the United Nations ,  [Plant Genetic Resources Newsletter: No. 115, September 1998] ,  Plant Genetic Resources Newsletter: No. 115, September 1998