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  1. On eastern Empidonaces with particular reference to variation in E. traillii /
    By: Snyder, L. L. - Royal Ontario Museum.
    Publication info: Toronto :Royal Ontario Museum,1953.
    Contributed by: ROM - University of Toronto (archive.org)
    Subjects: 1953  Alder flycatcher  canimp  Empidonax  Ontario  
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