Viet Nam, Cambodia, Laos and Thailand. ([editor no identificado], 1967)
"Modified conic projection, standard parallels 11° and 21° 30' ".--"Melville Bell Grosvenor, editor"--"Wellman Chamberlin, chief cartographer"--"Athos D. Grazzini, associate chief cartographer"--Publicado con "National Geographic magazine, v. 131, n. 2, febr. 1967--Inserciones: A. Continuación of Thailand. B. Location map