Law, H. (1914). Viavi hygiene: Explaining the natural principles upon which the Viavi system of treatment for men, women, and children is based (Rev. ed. ..). San Francisco, Cal.: The Viavi company, inc..

Law, Hartland. Viavi Hygiene: Explaining the Natural Principles Upon Which the Viavi System of Treatment for Men, Women, and Children Is Based. Rev. ed. .. San Francisco, Cal.: The Viavi company, inc., 1914.

Law, Hartland. Viavi Hygiene: Explaining the Natural Principles Upon Which the Viavi System of Treatment for Men, Women, and Children Is Based. Rev. ed. .. San Francisco, Cal.: The Viavi company, inc., 1914.