TY  - RPRT
TI  - Nitrate concentrations in ground water in the paleovalley alluvial aquifers of the Nemaha Natural Resources District, Nebraska, 1989 and 1994-96
AU  - A. H. Chen
PY  - 1998
DO  - 10.3133/wri984106
UR  - https://pubs.usgs.gov/publication/wri984106
ID  - wri984106
ER  -