Water pollution
Tripathi, A.K.
Water pollution - New Delhi: Ashish Publishing House, 1990. - ix,326p.:illu.
includes bibliography and index
81 7024 267 3
Social problems
Sanitary engineering
Water pollution
Sanitation
363.7394 T835w /1990
Water pollution - New Delhi: Ashish Publishing House, 1990. - ix,326p.:illu.
includes bibliography and index
81 7024 267 3
Social problems
Sanitary engineering
Water pollution
Sanitation
363.7394 T835w /1990