TY - BOOK ID - 138007011 TI - Index to water-quality data available from the U.S. Geological Survey in machine-readable form to December 31, 1972, western region AU - Showen, Charles R. AU - Williams, Owen O. AU - Geological Survey (U.S.) PY - 1973 PB - Washington, D.C. : U.S. Geological Survey, DB - UniCat KW - Information storage and retrieval systems KW - Water quality KW - Water quality. UR - https://www.unicat.be/uniCat?func=search&query=sysid:138007011 AB - ER -