Commercial profitability of offshore sand and gravel mining in southern California : an analysis for new entries

by Massoud Mokhtari-Saghafi and Robert H. Osborne. "Sea grant reprint series"--Cover. Reprinted from: Oceans '80, Murray Pub. Co., c1979. "This work is a result of research sponsored by NOAA Office of Sea Grant, Department of Commerce, the Department of Boating and Waterways, State of California, and the California State Lands Division." Also available online in PDF via NOAA Central Library Includes bibliographical references.