1874. On certain muscles in the thigh of birds and their value in classification. Ibid., Part II:111-123.
Greenberg, D. M.
1929. The colorimetric determination of serum proteins. J. Biol. Chem., 82:545-550.
Hellmayr, C. E.
1935. Catalogue of birds of the Americas. Field Mus. Nat. Hist., Zool. ser. 13, pt. 8, vi + 541 pp.
1936. Catalogue of birds of the Americas. Ibid., 13, pt. 9, v + 458 pp.
1937. Catalogue of birds of the Americas. Ibid., 13, pt. 10, v + 228 pp.
1938. Catalogue of birds of the Americas. Ibid., 13, pt. 11, vi + 662 pp.
Howard, H.