1. A.O.U. (American Ornithologists' Union) 1957 Checklist of North American Birds 5th edition Baltimore 691
2. Variables affecting the probabilities of dispersal in geologic time;Axelrod;Bull. Amer. Mus. Nat. Hist.,1952
3. Self-compatibility and establishment after “long-distance” dispersal;Baker;Evolution,1955
4. The contribution of autecology and genecological studies to our knowledge of the past migrations of plants;Baker;Amer. Nat.,1959
5. Life histories of North American gulls and terns;Bent;Bull. U. S. Nat. Mus.,1921