TY - RPRT TI - K-Ar geochronology of basement rocks on the northern flank of the Huancabama deflection, Ecuador AU - Tomas Feininger AU - M.L. Silberman PY - 1982 DO - 10.3133/ofr82206 UR - https://pubs.usgs.gov/publication/ofr82206 ID - ofr82206 ER -