Oceanside, Ocean Beach, Imperial Beach, and Coronado, San Diego County, Calif., Beach Erosion Control Study, Letter from the Acting Secretary of the Army Transmitting a Letter from the Chief of Engineers, Department of the Amy, Dated Februray 28, 1956, Submitting a Report, Together with Accompanying Papers and Illustrations...prepared Under the Provisions of Section 2 of the River and Harbor Act Approvedc on July 3, 1930, as Amended and Supplemented