Relief shown by contour interval 20 meters with supplementary contours at 10 meter intervals. Includes index to points of interest , military establishments, major government, educational, religious buildings; and major utilities. Stamped: Declassified. Compileld in 1968 from Laos 1:50.000, AMS sheet 6156 II, compiled in 1963 (topographic map, photogrammetric survey, reliability fair). Planimetric detail revised by photo-planimetric methods from aerial photography and miscellaneous sources.