Geophysical investigations preliminary maps. 3, pl. 3. Preliminary map showing total magnetic intensity in part of naval petroleum reserve no. 4, Alaska, compiled by D. L. Rossman, M. E. Hill, F. M. Byers, M. S. Walton, jr., J. R. Balsley, and R. Thurmond. Scale 1 m.=0.4 in., isomagnetic interval 10 gammas. n. p.

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