Relationships of the protoceratid artiodactyls and description of a new genus /
Stirton, R. A. 1901-1966.
Relationships of the protoceratid artiodactyls and description of a new genus / by R. A. Stirton. - Berkeley ; Los Angeles : University of California Press, 1967. - 44 p. illus. ; 26 cm. - University of California publications in geological sciences v. 72 .
Bibliography: p. 27-28.
Protoceratidae.
Lambdoceras.
Relationships of the protoceratid artiodactyls and description of a new genus / by R. A. Stirton. - Berkeley ; Los Angeles : University of California Press, 1967. - 44 p. illus. ; 26 cm. - University of California publications in geological sciences v. 72 .
Bibliography: p. 27-28.
Protoceratidae.
Lambdoceras.