Vietnam demarcation line and demilitarized zone.

"25863 3-57. SSO-655-5/57."
Shows northern Quảng Trị Province, along Song Ben Hai River, which separates North and South Vietnam.
Relief shown by spot heights.
"Base: Indochina (series L605), 1:100,000 / U.S. Army Map Service ..."
Available also through the Library of Congress Web site as a raster image.