“Overcoming water quality limitations with the multi-barrier concept : a case study from Colombia”
, in Slow sand filtration : an international compilation of recent scientific and operational developments
, 1994, pp. P. 47-60: fig., 3 tab.
“Performance evaluation of dynamic roughing filtration”
, vol. no. 137. IHE (International Institute for Infrastructural, Hydraulic and Environmental Engineering), Delft, The Netherlands, p. vi, 83 p.: 30 fig., 11 tab., 1994.
“A successful water rehabilitation project arising from diagnostic surveillance”
. University of Surrey, Department of Civil Engineering, Guildford, UK, p. viii, 75 p.: 18 fig., 7 tab., 1994.