2020-10-202020-10-20http://hdl.handle.net/1885/21267610 MB|1 map212 MB|1 map300 dpiimage/jpgimage/tiffenCopyright ExpiredTopographyWorld--MapsWorld, Mongolia, Series: GSGS 2957, Sheet 22, 1931, 1:4 000 00019312020-10-20