@article {dhslfg72, title = {Immunity in Shigellosis. I. Response of Man to Attenuated Strains of Shigella}, journal = {Journal of Infectious Diseases}, volume = {125}, year = {1972}, pages = {1}, author = {DuPont, H. L. and Hornick, R. B. and Snyder, M. J. and Libonati, J. P. and Formal, S. B. and Gangarosa, E. J.} } @article {dhdsf69, title = {The Response of Man to Virulent Shigella flexneri 2a}, journal = {Journal of Infectious Diseases}, volume = {119}, year = {1969}, pages = {3}, author = {DuPont, H. L. and Hornick, R. B. and Dawkins, A. T. and Snyder, M. J. and Formal, S. B.} }