TY - RPRT TI - Occurrence and distribution of arsenic and radon in water from private wells in the Rancocas aquifer, southern New Castle and northern Kent Counties, Delaware, 2015 AU - Judith M. Denver PY - 2016 DO - 10.3133/ofr20161143 UR - https://pubs.usgs.gov/publication/ofr20161143 ID - ofr20161143 ER -