A. H. Thiessen
Phys. Rev. (Series I) 8, 65 (1899) - Published 1 February, 1899
Edward B. Rosa and Arthur W. Smith
Phys. Rev. (Series I) 8, 79 (1899) - Published 1 February, 1899
Frank G. Baum
Phys. Rev. (Series I) 8, 95 (1899) - Published 1 February, 1899
Joseph Francis Merrill
Phys. Rev. (Series I) 8, 112 (1899) - Published 1 February, 1899
