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	1		International Conference on the Use of Constructed Wetlands in Water Pollution Control (1990. Cambridge) Constructed wetlands in water pollution control : procedings of the International Conference on the use of constructed Wetlands in water pollution control, held in Cambridge, UK, 24-28 september, 1990 / editors P. F. Cooper, B. C. Findlater. — Oxford : Pergamon, [1990]. — 605 p. : gráf., tab. ; 26 cm. — ( Advances in water pollution control)
	2		IAWPRC Workshop (5. 1990. Japan) Instrumentation, control and automation of water and wastewater treatment and transport systems : proceedings of the 5th IAWPRC Workshop held in Yokohama and Kyoto, Japan, 26 july-3 august 1990 / editor R. Briggs. — Oxford : Pergamon Press, [1990]. — 781 p. : il., gráf. ; 26 cm. — ( Advances in water pollution control)