Bibliography
Hay, O. P. 1930. Second bibliography and catalogue of the fossil Vertebrata of North America, Publication 390 of the Carnegie Institute of Washington, Volume 1 [Washington, D.C.]: Carnegie Institution of Washington.
Hay, O. P. 1930. Second bibliography and catalogue of the fossil Vertebrata of North America, Publication 390 of the Carnegie Institute of Washington, Volume 1 [Washington, D.C.]: Carnegie Institution of Washington.
