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Biennial report of the Topographic and Geological Survey of Pennsylvania.

APA Citation

Pennsylvania. Topographic and Geological Survey Commission., Geological Survey (U.S.). Biennial report of the Topographic and Geological Survey of Pennsylvania. Harrisburg, Pa.

MLA Citation

Pennsylvania. Topographic and Geological Survey Commission, and Geological Survey (U.S.). Biennial Report of the Topographic And Geological Survey of Pennsylvania. Harrisburg, Pa,

Warning: These citations may not always be complete (especially for serials).