A. Ll. Hughes and A. M. Skellett
Phys. Rev. 30, 11 (1927) - Published 1 July, 1927
T. R. Hogness and E. G. Lunn
Phys. Rev. 30, 26 (1927) - Published 1 July, 1927
J. H. Van Vleck
Phys. Rev. 30, 31 (1927) - Published 1 July, 1927
Fred Allison
Phys. Rev. 30, 66 (1927) - Published 1 July, 1927
T. H. Gronwall
Phys. Rev. 30, 71 (1927) - Published 1 July, 1927
Morton Masius
Phys. Rev. 30, 84 (1927) - Published 1 July, 1927