TY  - RPRT
TI  - Using Molecular Genetic Markers to Resolve a Subspecies Boundary: The Northern Boundary of the Southwestern Willow Flycatcher in the Four-Corner States
AU  - Eben H. Paxton
AU  - Mark K. Sogge
AU  - Tad C. Theimer
AU  - Jessica Girard
AU  - Paul Keim
PY  - 2008
DO  - 10.3133/ofr20081117
UR  - https://pubs.usgs.gov/publication/ofr20081117
ID  - ofr20081117
ER  -