Maps. Plan and profile of Flathead River, mouth to Flathead Lake, and tributaries, Mont., dam sites, topography by R. J. MacGinnis, Allen S. Sollid, Samuel H. Throm, Robert H. Bruce, Ervin L. Werner, and Arthur Johnson, surveyed in 1936, 1938, 1941, 1942, 1943, 1944 and 1945. n. p.