00342nam a2200133Ia 4500008004100000020001800041082001000059082001000069100002100079245006400100260001400164260002100178260000900199230118s9999||||xx |||||||||||||| ||und||  a81-7371-540-8  a181.4  bBHA/T  aerach bbharucha 0atextbook of environmental syudies for undergraduate courses  ahyderabad  buniversity press  c2005