TY  - RPRT
TI  - Nitrate in ground water in the Great Valley carbonate subunit of the Potomac River Basin
AU  - Matthew J. Ferrari
AU  - Scott W. Ator
PY  - 1995
DO  - 10.3133/wri954099
UR  - https://pubs.usgs.gov/publication/wri954099
ID  - wri954099
ER  -