https://en.wikipedia.org/wiki/Daniel_W._Gade

Nature and culture in the Andes, 1999---(Daniel W. Gade)

WWW Wikipedia, 18-8-2015---(Daniel Wynne Gade; 28 September 1936 – 15 June 2015. Escritor y profesor de Geografía en la University of Vermont. Miembro de Berkeley School of Latin Americanist Geography)