TY  - RPRT
TI  - Recent progress in the development of a SPARROW model of sediment for the conterminous U.S.
AU  - Gregory Schwarz
AU  - Richard Smith
AU  - Richard Alexander
AU  - John Gray
PY  - 2003
UR  - https://pubs.usgs.gov/publication/70120643
ID  - 70120643
ER  -