TY - RPRT TI - Potentiometric surface, 1980, and water-level changes, 1969-80, in the unconfined valley-fill aquifers of the San Luis Basin, Colorado and New Mexico AU - Thomas M. Crouch PY - 1985 DO - 10.3133/ha683 UR - https://pubs.usgs.gov/publication/ha683 ID - ha683 ER -