TY - RPRT TI - Index to potassium-argon ages of Cenozoic volcanic rocks of Oregon AU - G. W. Walker AU - G. B. Dalrymple AU - M. A. Lanphere PY - 1974 DO - 10.3133/mf569 UR - https://pubs.usgs.gov/publication/mf569 ID - mf569 ER -