1. Bradstreet, C. M., and C. E. D. Taylor: Technique of complement fixation test applicable to the diagnosis of virus diseases. Mth. Bull. Minist. Hlth Lab. Serv. 21, 96 (1962).
2. Chanock, R. M., D. C. Wong, R. J. Huebner, and J. A. Bell: Serologic response of individuals infected with parainfluenza-viruses. Amer. J. publ. Hlth 50, 1858 (1960).
3. Cook, K. M., B. E. Andrews, H. H. Fox, H. C. Turner, W. D. James, and R. M. Chanock: Antigenic relationship among the ?newer? myxoviruses (parainfluenza). Amer. J. Hyg. 69, 250 (1959).
4. ?, and R. M. Chanock: In vivo antigenic studies of parainfluenza viruses. Amer. J. Hyg. 77, 150 (1963).
5. Henle, W., and F. S. Lief: The broadening of antibody spectra following multiple exposures to influenza viruses. Amer. Rev. resp. Dis. 88, 379 (1963).