Biblio

U. Winblad, Drangert, J. - O., y Bew, J., «Ecological alternatives in sanitation : proceedings from Sida Sanitation Workshop, Balingsholm, Sweden 6-9 August 1997», vol. no. 9. SIDA, Swedish International Development Cooperation Agency, Stockholm, Sweden, p. ii, 90 p. : ill., tab., 1997.

E. Robson, «China's centuries-old recycling tradition gears for the future», Source, pp. p. 6-11: photogr., 1991.

ENSIC -Bangkok, TH, Environmental Sanitation Information Centre, Human faeces urine and their utilization. Bangkok, Thailand: Asian Institute of Technology, 1981, p. 83 p. : fig., tab.