● Pritchett IW,Stillman EG (1919). THE OCCURRENCE OF BACILLUS INFLUENZAE IN THROATS AND SALIVA. J. Exp. Med.29, 259-66. ● Bergey DH,Harrison FC,Breed RS,Hammer BW,Huntoon FM (1923). Bergey's Manual of Determinative Bacteriology. Edition: 1, Baltimore: The Williams & Wilkins Co.