@misc{indiciae6ee19bf23c17, title = {Ground-water levels in the carbonate rocks of central Chester County, Pennsylvania, May 18 to June 15, 1984}, author = {Charles R. Wood}, year = {1984}, doi = {10.3133/ofr84715}, url = {https://pubs.usgs.gov/publication/ofr84715}, note = {Source identifier: ofr84715} }