Manganese occurrences in eastern Pennsylvania
By: by Benjamin L. Miller
Series: Bulletin / Commonwealth of Pennsylvania, Department of Internal Affairs, Bureau of Topographic and Geological Survey -- no. 47; Bulletin (Pennsylvania. Bureau of Topographic and Geologic Survey) -- no. 47.
Publisher: Commonwealth of Pennsylvania, Dept. of Internal Affairs, Bureau of Topographic and Geological Survey
Published: 1922
Place of publication: Harrisburg]
Language: eng
Number of pages: 11
Subjects: Manganese ores
Notes: Caption title.

"July 15, 1922."

Includes bibliographical references.