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Geologic map of Gabbro Lake quadrangle, Lake County, Minnesota
Gabbro Lake quadrangle, Lake County, Minnesota
1 map : color ; 88 x 59 cm., folded in envelope 30 x 24 cm.
by J.C. Green, W.C. Phinney, and P.W. Weiblen.
"Base from U.S. Geological Survey topographic map, 1957."