pubs.usgs.govu.s. geological surmey george otis smith, director 75000' 41000' 00'...

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Page 1: pubs.usgs.govU.S. GEOLOGICAL SURMEY GEORGE OTIS SMITH, DIRECTOR 75000' 41000' 00' Henry Gannett, Chief Topographer. George H. Cook, Geographer in charge. 50