TY  - RPRT
TI  - Use of large-scale, multi-species surveys to monitor gyrfalcon and ptarmigan populations
AU  - Jonathan Bart
AU  - Mark Fuller
AU  - Paul Smith
AU  - Leah Dunn
PY  - 2011
UR  - https://pubs.usgs.gov/publication/70157196
ID  - 70157196
ER  -