Chacón, Didiher Diagnóstico sobre el comercio de las tortugas marinas y sus derivados en el Istmo Centroamericano = Assesment about the trade of the sea turtles and their products in the Central America isthmus - [S.l.] [s.n.] 2002 - 219 p. : ill., maps Universal Decimal Class. No.: 07.09.01 C431