TY  - RPRT
TI  - Double sampling to estimate density and population trends in birds
AU  - Jonathan Bart
AU  - Susan L. Earnst
PY  - 2002
DO  - 10.1642/0004-8038(2002)119[0036:dsteda]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70006409
ID  - 70006409
ER  -