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United Nations Development Programme ,  International Board for Plant Genetic Resources ,  [Report of a Working Group on Sunflower (Second Meeting): Held in Szeged, Hungary, 15-17 April 1986] ,  Report of a Working Group on Sunflower (Second Meeting): Held in Szeged, Hungary, 15-17 April 1986

International Board for Plant Genetic Resources ,  [Report of a Working Group on Sunflower: (Third meeting) held at the Institute of Field and Vegetable Crops, Novi Sad, Yugoslavia, 30, July 1988] ,  Report of a Working Group on Sunflower: (Third meeting) held at the Institute of Field and Vegetable Crops, Novi Sad, Yugoslavia, 30, July 1988

International Board for Plant Genetic Resources ,  European Cooperative Programme for the Conservation and Exchange of Crop Genetic Resources ,  [Report of a Working Group on Sunflower (fourth meeting): held at the Facoltà di Agraria, Università degli Studi di Pisa, Italy, 11-12 May 1991] ,  Report of a Working Group on Sunflower (fourth meeting): held at the Facoltà di Agraria, Università degli Studi di Pisa, Italy, 11-12 May 1991