http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Biosystematics of sibling species of flycatchers in the Empidonax hammondii-oberholseri-wrightii complex
JOHNSON, Ned K.: -- Biosystematics of sibling species of fly -- catchers in the Empidonax hammondii-ober -- holseri-wrightii complex. - Berkeley [usw.] -- Univ. of California Pr. 1963. S. 79-236 mit -- 28 Abb. u. 8 Taf., 8° -- (University of California Publications in -- zoology 66,2.) -- 1966! -- Mu..
University of California Publications in zoology 66,2