Gerwing, Julia, Long, D. A. & Mussett, Marjorie V.(1957). The assay of diphtheria toxin. Bulletin of the World Health Organization, 17 (4-5), 537 - 551. http://www.who.int/iris/handle/10665/265277
Journal
Bulletin of the World Health Organization, 17 (4-5): 537 - 551
