TY  - RPRT
TI  - County-based estimates of nitrogen and phosphorus content of animal manure in the United States for 1982, 1987, and 1992
AU  - Larry Puckett
AU  - Kerie Hitt
AU  - Richard Alexander
PY  - 1998
DO  - 10.3133/70046661
UR  - https://pubs.usgs.gov/publication/70046661
ID  - 70046661
ER  -