Aeromagnetic map of the Fort Wilkins quadrangle, Keweenaw County, Michigan / by J.R. Balsley, J.L. Meuschke, and Jean Blanchett ; Department of the Interior, United States Geological Survey.
- Format:
- Map/Globe
- Physical Desc.:
- 1 map ; 57 x 39 cm., on sheet 56 x 70 cm., folded in envelope 30 x 24 cm.
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