David M. Dennison

Rev. Mod. Phys. 12, 175 (1940) - Published 1 July, 1940

Millard F. Manning and Maurice E. Bell

Rev. Mod. Phys. 12, 215 (1940) - Published 1 July, 1940

Karl K. Darrow

Rev. Mod. Phys. 12, 257 (1940) - Published 1 July, 1940