The evolution of the vertebral column : A Contribution to the Study of Vertebrate Phylogeny / H. F .Gadow and edited by J.F.Gaskell, H.L.H.H. Green . Gadow , H. F . Gaskell, J.F. Green , H.L.H.H. Evolution. Vertebral. 596 GAE include index and bibliography . Cambridge : At the Univresity press , c1933. c1933. 1933 Text xiii , 244 p. : eng