Geophysical investigations preliminary maps. 1. Aeromagnetic map showing total intensity 1000 feet above surface of Oswegatchie quadrangle, St. Lawrence County, N. Y. [with text]; Aeromagnetic survey by J. R. Balsley, D. L. Rossman, C. L. Rogers, and E. M. Canfield, magnetic data compiled by H. E. Hawkes, W. J. Dempsey, M. E. Hill, and J. L. Meuschke, 1945, preliminary geology by A. F. Buddington and B. F. Leonard, 1945. Scale 2 in. = 1 m. n. p.