Ramphastos sulfuratus brevicarinatus - Rainbow (Keel) billed Toucan

Palmer, T. S. 1928. Auk: 45(1): 70-82.
The Forty-Fifth Stated Meeting of the American Ornithologists' Union

W. S. 1929. Auk: 46(2): 258-259.
Van Tyne on the Habits of the Toucan

Peters, J. L. 1930. Auk: 47(3): 405-408.
The Identity of the Toucans Described By Linnaeus in the 10th and 12th Editions of the Systema Naturae

Wagner, H. O. 1944. Wilson Bulletin: 56(2): 65-76.
Notes on the Life History of the Emerald Toucanet

Skutch, A. F. 1944. Wilson Bulletin: 56(3): 133-151.
Life History of the Blue-Throated Toucanet

Skutch, A. F. 1945. Auk: 62(1): 8-37.
Incubation and Nestling Periods of Central American Birds

Laughlin, R. M. 1952. Condor: 54(3): 137-139.
A Nesting of the Double-Toothed Kite in Panama

Amadon, D. and D. R. Eckelberry. 1955. Condor: 57(2): 65-80.
Observations on Mexican Birds

Mayfield, H. 1957. Auk: 74(3): 322-332.
In Memoriam: Josselyn Van Tyne

Clark, G. A., Jr. 1961. Wilson Bulletin: 73(3): 268-278.
Occurrence and Timing of Egg Teeth in Birds

Skutch, A. F. 1962. Wilson Bulletin: 74(2): 115-152.
The Constancy of Incubation

Skutch, A. F. 1971. Auk: 88(2): 381-396.
Life History of the Keel-Billed Toucan

Schoener, T. W. 1971. Condor: 73(2): 154-161.
Large-Billed Insectivorous Birds: a Precipitous Diversity Gradient

Howe, H. F. 1981. Auk: 98(1): 88-98.
Dispersal of a Neotropical Nutmeg (Virola Sebifera) By Birds

Riley, C. M. 1986. Wilson Bulletin: 98(4): 585-588.
Observations on the Breeding Biology of Emerald Toucanets in Costa Rica