TY - RPRT TI - Deformation monitoring at Nevado del Ruiz, Colombia - October 1985 - March 1988 AU - N.G. Banks AU - C. Carvajal AU - H. Mora AU - E. Tryggvason PY - 1990 UR - https://pubs.usgs.gov/publication/70016260 ID - 70016260 ER -