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Subjects
- Corporations -- United States[remove]2
- Account books1
- Business -- History1
- Coal mines and mining -- Pennsylvania1
- Correspondence1
- Court records1
- Deeds1
- Diaries1
- Families -- Pennsylvania1
- Genealogy1
- Indentures1
- Iron mines and mining -- Pennsylvania1
- Land titles1
- Letter books1
- Manuscripts (documents)1
- Maps (documents)1
- Memorabilia1
- Military records1
- Mineral industries -- Finance1
- Mortgages1