Aspers, Pennsylvania (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Aspers, Pennsylvania" in English language version.

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archive.today

  • Wood, C. R., 1980, Groundwater resources of the Gettysburg and Hammer Creek Formations, southeastern Pennsylvania: Pennsylvania Geological Survey, 4th ser., Water Resource Report 49, 87 p. (web release)

census.gov

census.gov

tigerweb.geo.census.gov

  • "ArcGIS REST Services Directory". United States Census Bureau. Retrieved October 12, 2022.

api.census.gov

data.census.gov

www2.census.gov

sunstar-solutions.com

  • Cornet, Bruce, 1977, Palynostratigraphy and age of the Newark Supergroup: Pennsylvania State University, unpublished Ph.D. dissertation, 505 p. abstract