@book{4928, author = {Lucas, Gren and Unión Mundial para la Conservación de la Naturaleza}, title = {The IUCN plant red data book }, publisher = {: IUCN}, year = {, 1980.}, address = {Morges, Switzerland }, edition = {Reprint}, note = {En port.: Published with the financial assistance of The World Wildlife Fund and The United Nations Environment Programme} }