T. W. Edmondson
Phys. Rev. (Series I) 6, 65 (1898) - Published 1 February, 1898
C. H. Wind
Phys. Rev. (Series I) 6, 98 (1898) - Published 1 February, 1898
S. J. Barnett
Phys. Rev. (Series I) 6, 114 (1898) - Published 1 February, 1898
Arthur L. Clark
Phys. Rev. (Series I) 6, 120 (1898) - Published 1 February, 1898
