TY  - RPRT
TI  - Improving population estimates of threatened spectacled eiders: Correcting aerial counts for visibility bias
AU  - Tyler Lewis
AU  - Michael Swaim
AU  - Joel A. Schmutz
AU  - Julian Fischer
PY  - 2019
DO  - 10.3354/esr00959
UR  - https://pubs.usgs.gov/publication/70204210
ID  - 70204210
ER  -