Author:Richard Crittenden McGregor

Books

 * Bulletins of the Philippine Museum, before 1923
 * The birds of Calayan and Fuga, Babuyan group, 1904
 * A Hand-list of the Birds of the Philippine Islands, 1906
 * Index to the Genera of Birds, 1920
 * A Manual of Philippine birds, 1909

Contributions to periodicals

 * To The Condor:
 * A New Race of the Brown Towhee, 1899
 * Protective Coloration, 1899
 * Eastern Junco and White-throated Sparrow in California, 1899
 * A Plea for the General Use of Scientific Names, 1899