Saul Dushman

Rev. Mod. Phys. 2, 381 (1930) - Published 1 October, 1930

L. W. McKeehan

Rev. Mod. Phys. 2, 477 (1930) - Published 1 October, 1930

Robert S. Mulliken

Rev. Mod. Phys. 2, 506 (1930) - Published 1 October, 1930