Bettelheim, K. A., Ismail, N., Shinebaum, R., Shooter, R. A., Moorhouse, E., & Farrell, W. (1976). The distribution of serotypes of Escherichia coli in cow-pats and other animal material compared with serotypes of E. coli isolated from human sources. Cambridge University Press.

Bettelheim, K. A., N. Ismail, R. Shinebaum, R. A. Shooter, E. Moorhouse, i W. Farrell. The Distribution of Serotypes of Escherichia Coli in Cow-pats and Other Animal Material Compared With Serotypes of E. Coli Isolated From Human Sources. Cambridge University Press, 1976.

Bettelheim, K. A., et al. The Distribution of Serotypes of Escherichia Coli in Cow-pats and Other Animal Material Compared With Serotypes of E. Coli Isolated From Human Sources. Cambridge University Press, 1976.