L. F. Curtiss.
Phys. Rev. 18, 255 (1921) - Published 1 October, 1921
A. B. Bryan
Phys. Rev. 18, 275 (1921) - Published 1 October, 1921
Leigh Page
Phys. Rev. 18, 292 (1921) - Published 1 October, 1921
R. D. Kleeman
Phys. Rev. 18, 303 (1921) - Published 1 October, 1921
Phys. Rev. 18, 313 (1921) - Published 1 October, 1921