Paul Ehrenfest / Martin J. Klein. Klein, Martin J. Ehrenfest, Paul, 1880-1933. Physicists Biography. 530.092 KLP Includes bibliographical references and index. Amsterdam ; New York : North-Holland Physics Pub. ; New York : Sole distributors for the U.S.A and Canada, Elsevier Science Pub. Co., 1985- 1985- 1985 Text v. :1 eng North-Holland personal library North-Holland personal library.