On eastern Empidonaces with particular reference to variation in E. traillii
By: by L.L. Snyder
Contributors: Royal Ontario Museum
Series: Contributions of the Royal Ontario Museum of Zoology and Palaeontology -- no. 35; Life sciences contributions -- no. 35
Publisher: Royal Ontario Museum
Published: 1953
Place of publication: Toronto
Language: eng
Number of pages: 26
Subjects: Empidonax; Alder flycatcher
Notes: Bibliography: 23-26.