- ☮
Pennsylvaniens fredsforening.
Historiske amerikanske, fredsgrupper.
Arkiver: Swarthmore College Peace Collection: Pennsylvania Peace Society Records, 1866-1928: Collection: DG 031,
- I Pennsylvania Peace Society, 1823-1829
II Pennsylvania Peace Society, 1839
III Pennsylvania Peace Society, 1850-1851
IV Pennsylvania Peace Society, 1866-1928
- Se også: Pennsylvania Arbitration and Peace Society.
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