References
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- . Ayliffe, G. A. J., Collins, B. J. & Lowbury, E. J. L.: Ward floors and other surfaces as reservoirs of hospital infection. J Hyg (Camb) 65: 515, 1967.
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- . Hambraeus, A., Bengtsson, S. & Laurell, G.: Bacterial contamination in a modern operating suite. 3. Importance of floor contamination as a source of airborne bacteria. J Hyg (Camb) 80: 169, 1978.