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1
Creator:
Mercer, Joseph 1837-1922
Subjects and Genres: ';
“...Science and Engineering--Notes Local sources...”
Record Source:
Archival Materials
Manuscript
2
Creator:
Wetherill, John Price 1844-1906
Subjects and Genres: ';
“...Science and Engineering--Notes Local sources...”
Record Source:
Archival Materials
Link to finding aid
Manuscript
3
Record Source:
Archival Materials
Link to finding aid
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4
Creator:
Dwyer family
Subjects and Genres: ';
“...Science and engineering--Pennsylvania--Philadelphia--20th century Local sources...”
Record Source:
Archival Materials
Link to finding aid
Manuscript