TY  - RPRT
TI  - Status and breeding ecology of the southwestern willow flycatcher in the Grand Canyon
AU  - Mark K. Sogge
AU  - Timothy J. Tibbitts
AU  - Jim R. Petterson
PY  - 1997
UR  - https://pubs.usgs.gov/publication/1015829
ID  - 1015829
ER  -