Citation Data
MLA
Geological Survey (U.S.). Doylestown Quadrangle, Pennsylvania, 1999 : 7.5 Minute Series (Topographic). Reston, Va. : Denver, Colo. :U.S. Geological Survey ; For sale by the Survey, 2001.
APA
Geological Survey (U.S.). (2001). Doylestown quadrangle, Pennsylvania, 1999 : 7.5 minute series (topographic) [Map]. Reston, Va. : Denver, Colo. :U.S. Geological Survey ; For sale by the Survey,
Chicago
Geological Survey (U.S.). “Doylestown Quadrangle, Pennsylvania, 1999 : 7.5 Minute Series (Topographic).” Reston, Va. : Denver, Colo. :U.S. Geological Survey ; For sale by the Survey, 2001.
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