2019-12-162019-12-16http://hdl.handle.net/1885/1955816 MB1 map172 MB1 map300 dpiimage/jpgimage/tiffenCopyright ExpiredTopographicVietnam -- MapsVietnam, Hiep Duc, Series: L7014, Sheet 6640 lll, 1968, 1:50 00019682019-12-16