TY  - RPRT
TI  - Book review: Bird census techniques, Second edition
AU  - John R. Sauer
PY  - 2002
DO  - 10.1650/0010-5422(2002)104[0698:bctse]2.0.co;2
UR  - https://pubs.usgs.gov/publication/5224159
ID  - 5224159
ER  -