...Service and list of publications.

Chicago citation style
Pennsylvania. Bureau of Topographic and Geologic Survey. ...Service and list of publications.. Retrieved from the Digital Public Library of America, https://archive.org/details/servicelistofpub00penn_9. (Accessed September 22, 2018.)
APA citation style
Pennsylvania. Bureau of Topographic and Geologic Survey, ...Service and list of publications.. Retrieved from the Digital Public Library of America, https://archive.org/details/servicelistofpub00penn_9
MLA citation style
Pennsylvania. Bureau of Topographic and Geologic Survey. Retrieved from the Digital Public Library of America <https://archive.org/details/servicelistofpub00penn_9>.
Note: These citations are programmatically generated and may be incomplete.