A manual of Philippine birds / McGregor, Richard C. (Richard Crittenden), 1871-1936 creator text book Manila : Bureau of Printing, 1909. 1909
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ENG Pt. 2: "Actual date of publication, January 31, 1910." pt. 1. Galliformes to Eurylæmiformes.--pt. 2. Passeriformes. Birds Philippines Philippine Islands. Bureau of Science. Publication ; no. 2, pt. 1-2 https://www.biodiversitylibrary.org/bibliography/18273 4683721 10.5962/bhl.title.18273 KKU