Cosslett, V. E. Introduction to electron optics : the production, propagation and focusing of electron beams / V.E. Cosslett - 2nd ed. - Oxford : Clarendon Press, 1950 - xiii, 293 p., [5] leaves of plates : ill ; 24 cm Includes bibliographical references and index Subjects--Topical Terms: Electron optics Dewey Class. No.: 537.56 / COI 1950