TY  - RPRT
TI  - Distribution and abundance of the least Bell's vireo (Vireo bellii pusillus) and the southwestern willow flycatcher (Empidonax traillii extimus) at selected southern California sites in 1997
AU  - B.E. Kus
AU  - P.P. Beck
PY  - 1998
UR  - https://pubs.usgs.gov/publication/96658
ID  - 96658
ER  -