na INLIS000000000026422 20150429075624.0 $a 978-979-021-494-1 $0010-041500000001289 $a 028.5 RET p C.5 $a 028.5 RET p C.5 $a Retno Widiyastuti $a Pahlawan Lingkungan $a Semarang $b PT. Bengawan Ilmu $c 2009 $a Arpus Kab. Magetan $a 49.057