Encyclopaedia of ecology, environment and pollution control.Vo 13, Air pollution the dangerous dimensions - R. Swarup; S.N. Mishra V.P. Jauhari (New Delhi Mittal Publications, 1992)
R. Swarup; S.N. Mishra & V.P. Jauhari: Encyclopaedia of ecology, environment and pollution control.Vo 13, Air pollution the dangerous dimensions. New Delhi. Mittal Publications, 1992. 81-7099-373-3--(363.7303SWA)
ENGLISH