Kohn, Robert Rothenberg, 1925- Principles of mammalian aging / by Robert R. Kohn. - Englewood Cliffs, N.J. : Prentice-Hall, 1971. - xiii, 171 p. : ill. ; 23 cm. Includes bibliographies. ISBN: 0137094361 Subjects--Topical Terms: Aging.Mammals--Physiology.