1965. Some radar measurements of the altitude of bird flight. Br. Birds 58: 393-426.

Eaton, R. J.

1933. The migratory movements of certain colonies of Herring Gulls (Larus argentatus smithsonianus Coues) in eastern North America. Part I. Bird-Banding 4(4): 165-176.

Eaton, R. J.

1934. The migratory movements of certain colonies of Herring Gulls in eastern North America. Part II. Bird-Banding 5(1): 1-19.

1934. The migratory movements of certain colonies of Herring Gulls in eastern North America. Part III. Bird-Banding 5(2): 70-84.

Emlen, S. T.

1967. Migratory orientation in the Indigo Bunting (Passerina cyanea). Part II: Mechanism of celestial orientation. Auk 84: 463-489.

1969. Bird migration: influence of physiological state upon celestial orientation. Science (Wash., D.C.) 165 (3894): 716-718.

1970. The influence of magnetic information on the orientation of the Indigo Bunting (Passerina cyanea). Anim. Behav. 18(2): 215-224.