TY - RPRT TI - Perturbation and melting of snow and ice by the 13 November 1985 eruption of Nevado del Ruiz, Colombia, and consequent mobilization, flow and deposition of lahars AU - T.C. Pierson AU - R. J. Janda AU - J.-C. Thouret AU - C.A. Borrero PY - 1990 UR - https://pubs.usgs.gov/publication/70016221 ID - 70016221 ER -