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1by Ollone, Henri Marie Gustave, vicomte d', 1868-“...China Description and travel....”
Published 1911
Book -
2
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3by Przhevalskii, Nikolai Mikhailovich, 1839-1888“...Tibet Autonomous Region (China) Description and travel....”
Published 1876
Book -
4by Rockhill, William Woodville, 1854-1914“...Tibet Autonomous Region (China) Description and travel....”
Published 1894
Government Document Book