Pasley, Charles M. S. (1 de janeiro de 1894). «Descriptive Notes on the Southern Plateau of Bolivia and the Sources of the River Pelaya». The Geographical Journal. 3 (2): 107. JSTOR1774025. doi:10.2307/1774025
jstor.org
Pasley, Charles M. S. (1 de janeiro de 1894). «Descriptive Notes on the Southern Plateau of Bolivia and the Sources of the River Pelaya». The Geographical Journal. 3 (2): 107. JSTOR1774025. doi:10.2307/1774025