Systematic notes on Palearctic birds. No. 43, Strigidae, the genera Otus, Aegolius, Ninox, and Tyto. American Museum novitates ; no. 2021

Vaurie, Charles.2005-10-062005-10-061960http://hdl.handle.net/2246/539619 p. ; 24 cm.Includes bibliographical references (p. 17-19).1917562 bytesapplication/pdfen-USQL1 .A436 no.2021, 1960StrigidaeSystematic notes on Palearctic birds. No. 43, Strigidae, the genera Otus, Aegolius, Ninox, and Tyto. American Museum novitates ; no. 2021Strigidae, the genera Otus, Aegolius, Ninox, and TytoGenera Otus, Aegolius, Ninox, and TytoPalearctic birds.text