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You searched for: All Creators Orr, Ed. Remove constraint All Creators: Orr, Ed. Subject Geographic Pennsylvania--Boundaries--Maryland. Remove constraint Subject Geographic: Pennsylvania--Boundaries--Maryland.
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1. Astronomers : moulders of American history.

Creator Personal:
Orr, Ed.
Title:
Astronomers : moulders of American history.
Call Number:
P11740
Date:
1935
Description:

Typescript.

Subject Personal:
Mason, Charles, 1730-1787., Dixon, Jeremiah, 1733-1779.
Subject Geographic:
Mason-Dixon Line., Maryland--Boundaries--Pennsylvania., Pennsylvania--Boundaries--Maryland.
All:
Mason-Dixon Line., Mason, Charles, 1730-1787., Maryland--Boundaries--Pennsylvania., Pennsylvania--Boundaries--Maryland., Dixon, Jeremiah, 1733-1779.