Conserving the wild relatives of crops

English version was published in 1988; 2nd edition issued in 1992. French version was published in 1992 with the aid of the Bureau des Ressources Génétiques (BRG), 1992. Spanish version was published by IBPGR, IUCN, WWF, US Fish and Wildlife Service and Conservation International by Addison-Wesley Iberoamericana, 1992. Portuguese version was published for IBPGR, IUCN, WWF and EMBRAPA/CENARGEN, Centro Nacional de Pesquisa de Recursos Genéticos e Biotecnologia by Addison-Wesley Iberoamericana, 1992.