The birds of North and Middle America : a descriptive catalogue of the higher groups, genera, species, and subspecies of birds known to occur in North America, from the Arctic lands to the Isthmus of Panama, the West Indies and other islands of the Caribbean sea, and the Galapagos Archipelago
Bulletin (United States National Museum), 50
Ridgway, Robert, 1850-1929
Friedmann, Herbert 1900-1987
Washington, Govt. Print. Off, 1901-
Pt.1-8, 1901-19, by Robert Ridgway; pt.9-10, 1941-46, by Ridgway, completed by Herbert Friedmann; pt.11- 1950- by Friedmann.
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