The ancient volcanic rocks of South Mountain, Pennsylvania:
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Bibliographic Details
Main Author: Bascom, Florence 1862-1945 (Author)
Format: Thesis Book
Language:English
Published: Washington, DC Gov. Print. Off. 1896
Series:Bulletin of the United States Geological Survey 136
Subjects:
Physical Description:124 S., XXVII Bl. zahlr. Ill., Kt.

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