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Authorized 1919 as Bureau of Topographic and Geological Survey, under the Department of Internal Affairs : by Act of 1923, creating the Department of Forests and Waters, the survey was merged in that department for administrative purposes, though it continues to function as the Geological Survey (co-operating with the United States Geological Survey)
Historical Society of Pennsylvania - Closed Stacks Vza.25
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- Format:
- Book
- Author/Creator:
- Pennsylvania Geological Survey (4th : 1919-)
- Language:
- English
- Physical Description:
- p. ; cm.
- Notes:
- State geologist: George Hall Ashley.
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