na INLIS000000000002578 0010-0121000944 S study of the feasibility of imppasing an irrigation service fee in the Jatiluhur irrigation area Fakultas Geografi Universitas Gajah Mada Yogyakarta Universitas Gajah Mada 1986 iv, 15 p. : ill ; 29 cm 551.311.2 551.311.2 WATER QUALITY RIVERS MADIUN AIR WADUK KENDANG. 3689 3689