International Bureau of the American Republics (1892) Colombia: A Handbook U.S. Government Printing Office, Washington DC, page 35, OCLC460613287
Schuster, Robert L.; Salceddo, Daniel A. and Valenzuela, Luis (2002) "Overview of catastrophic landslides of South America in the twentieth century" pp. 1–34 In Evans, Stephen G. and DeGraff, Jerome V, (editors) (2002) Catastrophic Landslides: Effects, Occurrence, and Mechanisms (Volume 15 of Reviews Engineering) Geological Society of America, Boulder, Colorado, ISBN0-8137-4115-7, page 8
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nasakiwe.gov.co
"¿Qué pasó en Páez?". Nasa Kiwe, la corporación para la reconstrucción de la cuenca del río Páez y zonas aledañas (the government corporation for the reconstruction of the Paez river basin). 27 June 2001. Archived from the original on 14 December 2002.
"¿Qué pasó en Páez?". Nasa Kiwe, la corporación para la reconstrucción de la cuenca del río Páez y zonas aledañas (the government corporation for the reconstruction of the Paez river basin). 27 June 2001. Archived from the original on 14 December 2002.
worldcat.org
International Bureau of the American Republics (1892) Colombia: A Handbook U.S. Government Printing Office, Washington DC, page 35, OCLC460613287
