TY  - RPRT
TI  - Seasonal distribution of bird populations at the Patuxent Research Refuge
AU  - D. J. Hoffman
AU  - Charles J. Henny
AU  - E. F. Hill
AU  - J.A. Keith
AU  - R. A. Grove
PY  - 2000
UR  - https://pubs.usgs.gov/publication/5224165
ID  - 5224165
ER  -