Biblio

C. Polprasert, Kongsricharoern, N., and Kanjanaprapin, W., “Production of feed and fertilizer from water hyacinth plants in the tropics”, Waste management & research, pp. p. 3-11: 3 fig., 6 tab., 1994.

W. Journey, Spira, W., and Skillicorn, P., “Duckweed aquaculture : a new aquatic farming system for developing countries”. World Bank, Washington, DC, USA, p. x, 76 p.: 1 box, 25 fig., 2 tab., 1993.

I. Lardinois and van de Klundert, A., Organic waste : options for small-scale resource recovery, vol. no. 1. Amsterdam, The Netherlands: Technology Transfer for Development, 1993, p. 132 p. : fig., ill., tab.

E. Robson, “Duckweed : a lowly plant finds a richer role cleansing waste and creating protein”, Source, pp. p. 22-26: photogr., 1991.

B. Sikka and Polprasert, C., Aquatic weeds and their uses : an overview of perspectives for developing countries, vol. no. 21. Bangkok, Thailand: Environmental Sanitation Information Center, ENSIC, 1986, p. 79 p.: fig., tab.