TY  - RPRT
TI  - The Conservation Reserve Program and grassland birds
AU  - Douglas H. Johnson
AU  - Michael D. Schwartz
PY  - 2003
DO  - 10.1046/j.1523-1739.1993.740934.x
UR  - https://pubs.usgs.gov/publication/1001150
ID  - 1001150
ER  -