S2175: Tibet: Map showing Explorations by Major C. H. D. Ryder, R. E., D. S. O. and Captains H. Wood, R. E. & H. M. Cowie, R. E. or the Tibet Frontier Commission. 1904
SRC reference title
Ryder map 1905
Journal / Volume title
The Geographical Journal
Issue / Volume no.
26 (no. 4)