TY  - RPRT
TI  - First-time observer effects in the North American Breeding Bird Survey
AU  - W. L. Kendall
AU  - B.G. Peterjohn
AU  - J.R. Sauer
PY  - 1996
DO  - 10.2307/4088860
UR  - https://pubs.usgs.gov/publication/5223223
ID  - 5223223
ER  -