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Protostrigidae
Avian Raptor Evolution
Tarsometatarsus of Protostrix from the Mid-Eocene of Wyoming
Novitates PUBLISHED by the AMERICAN MUSEUM of NATURAL HISTORY CENTRAL PARK WEST at 79TH STREET, NEW YORK, N.Y
Collected Papers in Avian Paleontology Honoring the 90Th Birthday of Alexander Wetmore
Colin 1.0. HARRISON 21X.1980
The World's Smallest Owl, the Earliest Unambiguous Charadriiform Bird
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