E. O. Wollan
Rev. Mod. Phys. 4, 205 (1932) - Published 1 April, 1932
Herbert H. Kimball
Rev. Mod. Phys. 4, 259 (1932) - Published 1 April, 1932
R. C. Gibbs
Rev. Mod. Phys. 4, 278 (1932) - Published 1 April, 1932