Halstead, L. B. The pattern of vertebrate evolution [by] L. B. Halstead. - Edinburgh Oliver & Boyd 1969. - xii, 209 p. plate, illus. 23 cm. - University reviews in biology . Includes bibliographical references. ISBN: 0050017357 LCCN: 78460094 Nat. Bib. No.: B69-12159 Subjects--Topical Terms: Vertebrates, FossilVertebrates--Evolution. LC Class. No.: QE841 / .H25 1969 Dewey Class. No.: 596/.03/8