na INLIS000000000006147 20231202141335 231202||||||||| | ||| |||| || | 979-407-840-9 010-1223006147 id 333.7 333.7 PRA e Pratomo, Suyadi Empat sumber alam dan faedah cagar alam Cet.2 Jakarta Balai Pustaka 1995 63 hlm. : ilus. ; 22 cm. R11.03 - R11-0043 Sumber Alam