A. J. Dempster

Phys. Rev. 18, 415 (1921) - Published 1 December, 1921

Erwin W. Tschudi

Phys. Rev. 18, 423 (1921) - Published 1 December, 1921

R. V. L. Hartley and Thornton C. Fry

Phys. Rev. 18, 431 (1921) - Published 1 December, 1921

Otto Koppius

Phys. Rev. 18, 443 (1921) - Published 1 December, 1921

R. A. Millikan

Phys. Rev. 18, 456 (1921) - Published 1 December, 1921

E. H. Kurth

Phys. Rev. 18, 461 (1921) - Published 1 December, 1921

Phys. Rev. 18, 477 (1921) - Published 1 December, 1921