Protected areas of the world : a review of national systems. - World Congress on National Parks and Protected Areas 1992 : Caracas) (Gland, Switzerland : IUCN, 1991)
v. 4. Nearctic and neotropical.
"Compiled by the World Conservation Monitoring Centre in collaboration with the IUCN Commission on National Parks and Protected Areas for the IVth World Congress on National Parks and Protected Areas, Caracas, Venezuela, 10-21 February 1992.".
"November 1991" -- v. 1-3.
"December 1992" --v. 4.
Keywords: Áreas protegidas; Parques nacionais e reservas