Chicago: Field Museum press, 1939. — 479 p. — Field Museum of Natural History. Zoological series. Volume 25, part 1.This work is the result of a series of activities, and its final scope was not anticipated for some years. In the course of some studies of bird morphology and related topics, about three thousand references were accumulated. During the preparation of a still unpublished monograph on bird anatomy, the problem of the form of publication of the bibliography was discussed with friends. From some of them came the suggestion that it be published separately so that it might be available to workers who might not possess the monograph.
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