Biblio

S. F. Tyrrel and Gardner, S., “The development of a biologically-enhanced iron removal filter for use with borehole-handpump water supplies : interim report”. Cranfield University at Silsoe, Silsoe, UK, p. 3 p. : 1 drwng., 1996.

R. C. Carter, Tyrrel, S. F., and Howsam, P., “Strategies for handpump water supply in less-developed countries”, Water and environment journal, pp. p. 130-136 : 3 tab., 1996.