Atlas /
Pennsylvania Geological Survey.
APA Citation
Geological Survey (U.S.)., Pennsylvania. Bureau of Topographic and Geologic Survey. Atlas. Harrisburg, Pa.: Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey.
MLA Citation
Geological Survey (U.S.), and Pennsylvania. Bureau of Topographic and Geologic Survey. Atlas. Harrisburg, Pa.: Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey,
Warning: These citations may not always be complete (especially for serials).