Kelley, J.T., Lee, K., Belknap, D.F., and Dickson, S.M., 2006, Assessment of sand and gravel resources along the inner continental shelf of Maine: Years 1, 2, Outer Saco Bay: A multiyear cooperative between the U.S. Minerals Management service, the Maine Geological Survey and the University of Maine. Maine Geological Survey Open-File report.