TY - RPRT TI - Geologic map of the Washougal quadrangle, Clark County, Washington, and Multnomah County, Oregon AU - Russell C. Evarts AU - Jim E. O'Connor AU - Terry L. Tolan PY - 2013 DO - 10.3133/sim3257 UR - https://pubs.usgs.gov/publication/sim3257 ID - sim3257 ER -