TY - BOOK ID - 138154510 TI - An evaluation of several geophysical methods for characterizing sand and gravel deposits AU - Ellefsen, Karl AU - Lucius, Jeffrey E. AU - Fitterman, David V. AU - Geological Survey (U.S.) PY - 1998 PB - Denver, CO : U.S. Department of the Interior, U.S. Geological Survey, DB - UniCat KW - Aggregates (Building materials) KW - Prospecting KW - Geophysical methods. UR - https://www.unicat.be/uniCat?func=search&query=sysid:138154510 AB - ER -