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MapGeneral diagram : [western Philadelphia city and adjacent portions of Delaware and Montgomery counties, Pennsylvania]. Topographic map showing proposed and existing Civil-War batteries and defensive positions immediately west of Philadelphia. Relief shown by contours and hachures. Title from southern sheet. Partial tracing of the 1863 ms. topographic...
- Contributor: United States Coast Survey - Bache, A. D. (Alexander Dallas)
- Date: 1863-01-01
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