Gannett, Samuel S. (Samuel Stinson), 1861-1939. 4546
... Results of spirit leveling in Pennsylvania for the years 1899 to 1905 inclusive / by S. S. Gannett and D. H. Baldwin.
Washington : Gov't print. off., 1906.
Subject series: F, Geography, 50.
Issued also as House doc. no.836, 59th Cong., 1st sess.
Altitudes -- Measurement -- Pennsylvania.
Pennsylvania -- Altitudes.
Baldwin, David Henry, 1873-, joint author.
Philadelphia Area Center for History of Science
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