TY  - RPRT
TI  - A survey protocol for the Southwestern Willow Flycatcher (Empidonax traillii extimus)
AU  - Timothy J. Tibbitts
AU  - Mark K. Sogge
AU  - Susan J. Sferra
PY  - 1994
UR  - https://pubs.usgs.gov/publication/70129513
ID  - 70129513
ER  -