Brownsville quadrangle, Pennsylvania : 15 minute series (topographic)

Chicago citation style
Geological Survey (U.S.). Brownsville quadrangle, Pennsylvania : 15 minute series (topographic). 1954. Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/25409. (Accessed December 12, 2018.)
APA citation style
Geological Survey (U.S.), (1954) Brownsville quadrangle, Pennsylvania : 15 minute series (topographic). Retrieved from the Digital Public Library of America, http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/25409
MLA citation style
Geological Survey (U.S.). Retrieved from the Digital Public Library of America <http://digital.libraries.psu.edu/cdm/ref/collection/maps1/id/25409>.
Note: These citations are programmatically generated and may be incomplete.