UNITED STATES DEPARTMENT OF COMMERCE JUANITA M. KREPS, Secretary NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION RICHARD A. FRANK, Administrator UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY H. WILLIAM MENARD, Director GR45212 Front cover: Acadia National Park, Maine. Photo courtesy of National Park Service U.S. Department of the Interior For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402 Stock No. 024-001-03046-2/Library of Congress catalog-card No. 78-600000 |