TY - GEN AU - Sethi, Indrajeet AU - Sethi, M.S. AU - Iqbal, S.A. TI - Environmental pollution : causes, effects & control SN - 8171691234 PY - 1991/// CY - New Delhi PB - Commonwealth Publishers KW - ENVIRONMENTAL PROTECTION KW - AIR POLLUTION KW - NOISE POLLUTION KW - WATER POLLUTION ER -