na INLIS000000000026770 20150511101523.0 $a 978-979-021-494-1 $0010-051500000000190 $a 028.5 RET p C.3 $a 028.5 RET p C.3 $a Retno Widiyastuti $a Pahlawan Lingkungan $a Semarang $b PT. Bengawan Ilmu $c 2009 $a Arpus Kab. Magetan $a 49.055