1. The distribution of serotypes of Escherichia coli in cow-pats and other animal material compared with serotypes of E. coli isolates from human sources;BETTELHEIM;Journal of Hygiene,1976
2. Sensitivity patterns of Escherichia coli isolated from calves during and following prophylactic chlor-tetracycline therapy;BROPHY;British Veterinary Journal,1977
3. Ecology of intestinal Escherichia coli in pigs;CRAVEN;Canadian Journal of Comparative Medicine,1971
4. Antibiotic resistance and transferable antibiotic resistance of Escherichia coli isolated from calves on a modern farm with therapeutic problems and unsatisfactory management conditions;FARRIS;Nordisk Veterinaermedicin,1979
5. Escherichia coli isolated from dams and their calves;GLANTZ;American Journal of Veterinary Research,1968