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Cover image for Scientific Lectures
Scientific Lectures
by 
Lubbock, John Sir
Format: 
Electronic Format: 
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Excerpt: 
Natural history.
Cover image for The Pennsylvania-German in the Field of the Natural Sciences
The Pennsylvania-German in the Field of the Natural Sciences
by 
Porter, Thomas Conrad
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Excerpt: 
The Pennsylvania-German in the Field of the Natural Sciences Porter, Thomas Conrad
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