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Lloyd, B.J., Wheeler, D., y Baker, T., «Appropriate water supply systems for disaster relief. II. The evaluation and development of a treatment system for surface water». University of Surrey, Department of Microbiology, Guildford, UK, p. 13 p., 1983.

Lloyd, B.J., Wheeler, D., y Baker, T., «Appropriate water supply systems for disaster relief. Vol. 2. The evaluation and development of a treatment system for surface water». University of Surrey, Department of Microbiology, Guildford, UK, p. 13 p., 1983.