%0 Map %0 U.S. Federal Government Document %0 Print %A Healey, D. L. (Don L.), 1927- %E Kibler, J. D. %I U.S. Geological Survey %D 1976 %C Reston, Va. %G English %B Geophysical investigations (Geological Survey (U.S.)) %T Complete Bouguer and free-air gravity anomaly maps of the Rat Islands west of Amchitka Island, Alaska