Тексаркан: P. J. Landrigan, Epidemic Measles in a Divided City, Journal of the American Medical Association 221 (1972): 567–570.
456
Требования при приеме в школу в 50 штатах: Colgrove, State of Immunity, 177.
457
Заболеваемость корью в США, 1998 г.: W. A. Orenstein and A. R. Hinman, The Immunization System in the United States – The Role of School Immunization Laws, Vaccine 17 (1999): S19 – S24.
