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  1. I. Birds from Mindoro and small adjacent islands. II. Notes on three rare Luzon birds.
    By: McGregor, Richard C.
    Publication info: Manila,Bureau of Public Printing,1905.
    Contributed by: University of California Libraries (archive.org)
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  2. A manual of Philippine birds / by Richard C. McGregor.
    By: McGregor, Richard C.
    Publication info: Manila :Bureau of Printing,1909.
    Contributed by: University of California Libraries (archive.org)
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  3. A manual of Philippine birds / by Richard C. McGregor.
    By: McGregor, Richard C.
    Publication info: Manila :Bureau of Printing,1909.
    Contributed by: American Museum of Natural History Library
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