TY  - RPRT
TI  - Distribution and abundance of Least Bell’s Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Middle San Luis Rey River, San Diego County, Southern California—2018 data summary
AU  - Lisa D. Allen
AU  - Barbara E. Kus
PY  - 2019
DO  - 10.3133/ds1109
UR  - https://pubs.usgs.gov/publication/ds1109
ID  - ds1109
ER  -