TY  - RPRT
TI  - Regional patterns in proportion of bird species detected in the North American Breeding Bird Survey
AU  - J.R. Sauer
AU  - J.D. Nichols
AU  - J.E. Hines
AU  - T. Boulinier
AU  - C.H. Flather
AU  - W. L. Kendall
PY  - 2001
UR  - https://pubs.usgs.gov/publication/5211388
ID  - 5211388
ER  -