Biblio

B. J. Lloyd, Wheeler, D., Pardon, M., y Symonds, C. N., «Aspects of prefiltration concerned with the application of small scale slow sand filtration in rural communities». University of Surrey, Department of Microbiology, Guildford, UK, p. 112 p.: fig., tab., photogr., 1985.

B. J. Lloyd, Wheeler, D., Pardon, M., y Symonds, C. N., «Progress report (phase II) for the attention of UK Overseas Development Administration : rural water treatment package plant». Overseas Development Administration (ODA), London, UK, p. 134 p.: fig., 1983.