00931nam0-22002771i-450-99000163791040332120050401091603.0000163791FED01000163791(Aleph)000163791FED0100016379120030910d1963----km-y0itay50------baengBiosystematics of sibling species of flycatchers in the empidonax hammondii- oberholseri-wrightii complexNed K. JohnsonBerkeley and Los AngelesUniversity of California press1963236 p., 8 tav.26 cmZoologia591Johnson,Ned K.70192ITUNINARICAUNIMARCBK99000163791040332160 591 B 1639245FAGBCFAGBCBiosystematics of sibling species of flycatchers in the empidonax hammondii- oberholseri-wrightii complex367701UNINA