Biblio

B. J. Lloyd, Wheeler, D., Pardon, M., and 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., and 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.