NOAA Atlas 3—The Central North Atlantic Ocean Basin and Continental Margins: Geology, Geophysics, Geochemistry, and Resources, including the Trans-Atlantic Geotraverse (TAG), by Peter A. Rona (U.S. Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, 1980), 99 pp. $17.00. Master Tables for Electromagnetic Depth Sounding Interpretation by R. K. Verma (N.Y.: Plenum, 1979).