TY - BOOK ED - European Cooperative Programme for Crop Genetic Resources Networks. TI - Report of a working group on sunflower: (4th meeting) held at Facolta di Agraria, Universita degli Studi di Pisa, Pisa, Italy, 11 - 12 May 1991 PY - 1992/// CY - Rome PB - ECPCGRN KW - Sunflower ER -