HAYDEN: GEOLOGY OF THE PROVINCES OF TSANG AND t}. 
1905. Younghusband, Sir F. E. The Geographical results of the Tibet 
Mission. Geogr. Journ., XXV, 481. 
1906, Burrard, Lt.-Col. S. G. On the Geography of Tibet. Ann. Rep., 
Board Sci. Adv. Ind,, 1904-05, p. 61. 
( '93 ) 
