1. Annual address: the causation of diphtheria Author(s): Welch, William Henry, 1850-1934, author Publication: [Baltimore?] : [publisher not identified], [1891?] Subject(s): Diphtheria -- etiologyDiphtheria -- microbiology
2. The etiology of diphtheria Author(s): Nelson, Samuel N., author Publication: Boston : Cupples & Hurd, [1889?] Subject(s): Diphtheria -- etiologyDiphtheria -- microbiology
