TY - RPRT TI - Residence time, chemical and isotopic analysis of nitrate in the groundwater and surface water of a small agricultural watershed in the Coastal Plain, Bucks Branch, Sussex County, Delaware AU - John W. Clune AU - Judith M. Denver PY - 2012 DO - 10.3133/sir20125235 UR - https://pubs.usgs.gov/publication/sir20125235 ID - sir20125235 ER -