TY - RPRT TI - Potential for aquifer compaction, land subsidence, and earth fissures in Avra Valley, Pima and Pinal Counties, Arizona AU - S. R. Anderson PY - 1987 DO - 10.3133/ofr87685 UR - https://pubs.usgs.gov/publication/ofr87685 ID - ofr87685 ER -