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For more information about Pennsylvania geologic maps, topographic maps, and aerial photos, please contact:

DCNR Bureau of Topographic and Geologic Survey
3240 Schoolhouse Road
Middletown, PA 17057

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For information regarding Pennsylvania historical records, please contact:

Pennsylvania Historical & Museum Commission Pennsylvania State Archives
350 North Street
Harrisburg, PA 17120-0090
(717) 783-3281

Sponsored by the Pennsylvania Geological Survey