http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Distribution and abundance of Least Bell's Vireo (Vireo bellii pusillus) and Southwestern Willow Flycatcher (Empidonax traillii extimus) on the Middle San Luis Rey River, San Diego County, Southern California--2018 data summary
1 online resource (iv, 10 pages) : color maps.
Includes bibliographical references (pages 10-12).
Data series (Geological Survey (U.S.)) ; 1109