Results of spirit leveling in Pennsylvania for the years 1899 to 1905 inclusive - Gannett, Samuel S. (Samuel Stinson), 1861-1939.; Baldwin, David Henry, 1873- (Washington, Govt. Print. Off., 1906)
Subject series: F, Geography, 50.
Issued also as House doc. no. 836, 59th Cong., 1st sess.
Includes index.
Keywords: Pennsylvania -- Altitudes