Results of spirit leveling in Pennsylvania for the years 1899 to 1905 inclusive / by S.S. Gannett and D.H. Baldwin.
- Physical Description: 1 online resource (62 pages).
- Publisher: Washington, D.C. : Department of the Interior, United States Geological Survey, 1906.
- Distributor: Washington : Government Printing Office
Title from title screen (viewed June 27, 2014).
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|Subject:||Pennsylvania > Altitudes.