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Report of a Working Group on Sunflower : fourth meeting, held at Facoltà di Agraria, Università degli Studi di Pisa. Pisa, Italy 11-12 May 1991 / European Cooperative Programme for Crop Genetic Resources Networks (ECP/GR); IBPGR.
— Rome : IBPGR, 1992. 1 v. (sin paginar) : il. ; 30 cm.
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