TY - BOOK AU - Srivastava, Yogendra N. TI - Environmental pollution SN - 817024210X U1 - 363.7 21st ed. PY - 1997/// CY - New Delhi PB - Ashish Publishing House KW - Air pollution KW - Ecology KW - Environment KW - Environmental protection KW - Noise pollution KW - Pollution KW - Soil pollution KW - Water pollution ER -