Laszlo Tisza.Reprinted from the Review of modern physics, v. 35, no. 1, January, 1963. "February 1, 1963"--Cover.Includes bibliographical references.Army Signal Corps Contract DA36-039-sc-78108 and DA-SIG-36-039-61-G14. Dept. of the Army Task 3-99-20-001 and Project 3-99-00-000.