@misc{indiciaec54afaba6dd5, title = {Possible sources of nitrate in ground water at swine licensed-managed feeding operations in Oklahoma, 2001}, author = {Mark F. Becker and Kathy D. Peter and Jason Masoner}, year = {2002}, doi = {10.3133/wri024257}, url = {https://pubs.usgs.gov/publication/wri024257}, note = {Source identifier: wri024257} }