Walter A. Lawrance Androscoggin River Studies Eighteenth Annual Report, November, 1960, Series I: Androscoggin River 1940-1983, Subseries I: Androscoggin River Studies, Box 3, Folder 4, Walter A. Lawr..
Walter A. Lawrance Androscoggin River Studies Eighteenth Annual Report, November, 1960, Series I: Androscoggin River 1940-1983, Subseries I: Androscoggin River Studies, Box 3, Folder 4, Walter A. Lawrance Papers, Edmund S. Muskie Archives and Special Collections Library, Bates College, Lewiston, Maine.