Using molecular genetic markers to resolve a subspecies boundary : the northern boundary of the southwestern willow flycatcher in the four-corner states / by Eben H. Paxton [and others] ; in cooperation with Northern Arizona University.
Mode of access: Internet via the USGS web site. Address as of 07/14/08: http://pubs.usgs.gov/of/2008/1117/of2008-1117.pdf; current access available via PURL.
Note
Title from PDF title screen (viewed on May 14, 2008).
At head of title on HTML title screen: Colorado Plateau Research Station.