Monsalve-B., M.L. and Laverde-C, C.A. 2016. HISTORICAL ACTIVITY RECORD OF CHILES AND CERRO NEGRO VOLCANOES (COLOMBIAN-ECUADORIAN BORDER). Boletín de Geología. 38, 4 (Oct. 2016), 61–78. DOI:https://doi.org/10.18273/revbol.v38n4-2016004.