TY  - RPRT
TI  - Estimates of county-level nitrogen and phosphorus from fertilizer and manure from 1950 through 2017 in the conterminous United States
AU  - James A. Falcone
PY  - 2021
DO  - 10.3133/ofr20201153
UR  - https://pubs.usgs.gov/publication/ofr20201153
ID  - ofr20201153
ER  -