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Character variation and evolution of sibling species in the Empidonax difficilis-flavescens complex (Aves, Tyrannidae) (University of California publications in zoology ; v. 112)
by
Ned K Johnson
ISBN-13: 9780520095991
ISBN-10: 0520095995
Publication date: 1980
Publisher:
University of California Press
Format:
Paperback
151 pages