[569] As fully explained in Eth. p. 303.
[570] Mark Aurel Stein, Sand-buried Cities of Khotan, 1903, and Geog. Journ., July, Sept. 1909.
[571] R. Pumpelly, Explorations in Turkestan, 1905, and Explorations in Turkestan; Expedition of 1904, 1908.
[572] Sven Hedin, Scientific Results of a Journey in Central Asia, 1899-1902, 1906, and Geog. Journ., April, 1909.
[573] Douglas Carruthers, Unknown Mongolia, 1913 (with bibliography).
[574] Ellsworth Huntington, The Pulse of Asia, 1910.
[575] "The Asiatic Background," Cambridge Medieval History, Vol. I. 1911.
[576] Mémoires de la Délégation en Perse; Recherches archéologiques (from 1899).
[577] Sand-buried Cities of Khotan, 1903.
[578] "Ueber Alte Grabstätten in Sibirien und der Mongolei," in Mitt. d. Anthrop. Ges., Vienna, 1895, xxv. 9.