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Subjects
- College teachers2
- Metallurgists[remove]2
- Architecture1
- Bills1
- Catalogs1
- Checks (bank checks)1
- Diagrams1
- Engravings (prints)1
- Invoices1
- Laboratory notebooks1
- Letter books1
- Lists (document genres)1
- Maps (documents)1
- Metallurgical research1
- Metallurgy1
- Metallurgy -- Equipment and supplies1
- Metallurgy -- Study and teaching1
- Mineralogists1
- Mines and mineral resources1
- Mining corporations1