1. A permanent nephelometer from pyrex glass;Brewer;American Journal of Public Health,1939
2. Correlation between optical density and viable germ count during cultivation of B. pertussis. Zentrablatt für Bakteriologie, Parasitenkunde Infectionskrankheiten und Hygiene I;Csizér;Ableitung Originale,1971
3. Significance of bacteriological methods in the diagnosis and control of whooping cough;Kendrick;American Journal of Public Health,1935
4. Tentative methods for the bacteriological diagnosis and control of whooping cough;Kendrick,1935
5. The international reference preparation for opacity;Maaløe;Bulletin of the World Health Organization,1955