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“Report of the seventh meeting : Rome, 7-11 September 1987”. Joint WHO/FAO/UNEP Panel of Experts on Environmental Management for Vector Contr, Geneva, Switzerland, p. 72 p.: fig., tab., 1987.
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“[.. title in Sinhalese ..] [Means of disease transmission]”. National Water Supply and Drainage Board, Ratmalana, Sri Lanka, p. 16 p.: fig., 1987.