@misc{indiciae8ccc8a2a4ff5, title = {Relation between selected well-construction characteristics and occurrence of bacteria in private household-supply wells, south-central and southeastern Pennsylvania}, author = {Tammy M. Zimmerman and Michele L. Zimmerman and Bruce D. Lindsey}, year = {2001}, doi = {10.3133/wri014206}, url = {https://pubs.usgs.gov/publication/wri014206}, note = {Source identifier: wri014206} }