na INLIS000000000028649 20190503013211 190503||||||||| | ||| |||| ||ind|| 978 - 979 010-0519028649 ind 628.5 628.5 PUR a Purwanto Awas Polusi Edisi Cet . 1 Jakarta Pustaka Utama Graafiti 2008 vi , 58 hlm. Ada POLUSI