BioStor
 | 9. NOTES ON THE GENERA AND SPECIES OF CYPSELIDae P L Sclater (1865) Proceedings of The Zoological Society of London 1865: 593-617 |
 | Birds collected by Dr. W. L. Abbott and Mr. C. B. Kloss in the Andaman and Nicobar Islands Charles W Richmond (1902) Proceedings of The United States National Museum 25: 287-314 |
 | A monograph of the genus Collocalia H C Oberholser (1906) Proceedings of the Academy of Natural Sciences of Philadelphia 58: 177-212 |
 | Generic names applied to birds during the years 1901 to 1905, inclusive, with further additions to Waterhouse's "Index Generum Avium" Charles W Richmond (1908) Proceedings of The United States National Museum 35: 583-655 |
 | The butterflies of Siam (1916) Journal of The Natural History Society of Siam 2: 106-147 |