Vietnam : Cambodia, Laos and Eastern Thailand /
Chamberlin, Wellmancartographer.
Grosvenor, Melville Bell,1901-1982,editor.
Calder, Ritchie,1906-1982,former owner.StEdNL
National Geographic Society.Cartographic Division.
Includes index.
Relief shown by gradient tints and spot heights.
Map from the National Geographic Magaine, January 1965, Vol. 127, No. 1.