1. Parker, H. N.: City Milk Supply, p. 370, 1917.
2. Pearson, L. A.: Proceedings of the First International Veterinary Congress of America. October, 1913.
3. The relative importance of the bovine and human types of tubercle bacilli in the different forms of tuberculosis;Park,1913
4. Milk as a cause of epidemics of typhoid fever, scarlet fever, and diphtheria. Public Health and Marine Hospital Service of the United States;Trask;Hygienic Laboratory Bul.,1909
5. The quantitative relationship of milk-borne infection in the transmission of human communicable diseases;Kelley;Jour. Am. Med. Assoc,1916