Results of spirit leveling in Pennsylvania, 1899 to 1911, inclusive
By: R.B. Marshall, chief geographer. Work done in cooperation with the state. Reprinted with corrections.
Contributors: Pennsylvania. Bureau of Topographic and Geologic Survey.
Series: Geological Survey bulletin,; 515
Publisher: Govt. Print. Off.
Published: 1918
Place of publication: Washington
Language: eng
Number of pages: 164
Subjects: Pennsylvania -- Altitudes.