Results of spirit leveling in Pennsylvania, 1899 to 1911, inclusive
By: R. B. Marshall, chief geographer.  Work done in cooperation with the state.
Contributors: Pennsylvania. Bureau of Topographic and Geologic Survey
Series: U.S. Geological survey. Bulletin 515
Publisher: Govt. Print. Off.
Published: 1912
Place of publication: Washington
Language: eng
Number of pages: 164
Subjects: Pennsylvania -- Altitudes.
Notes: Includes index.