A. P. Wills
Phys. Rev. (Series I) 19, 65 (1904) - Published 1 August, 1904
P. G. Nutting
Phys. Rev. (Series I) 19, 98 (1904) - Published 1 August, 1904
J. C. Shedd and R. L. Ingersol
Phys. Rev. (Series I) 19, 107 (1904) - Published 1 August, 1904
K. E. Guthe
Phys. Rev. (Series I) 19, 138 (1904) - Published 1 August, 1904
John C. Shedd
Phys. Rev. (Series I) 19, 154 (1904) - Published 1 August, 1904
J. Frank Meyer
Phys. Rev. (Series I) 19, 156 (1904) - Published 1 August, 1904