na INLIS000000000002230 0010-0121000596 Laporan akhir pra study kelayakan persawahan daerah irigasi Bajayu Medan C.V Multi Systems Engineering Consultan 1993 ix, 140 p. ill ; 29 cm 631.67 631.67 IRRIGATION FEASIBILITY STUDIES NORTH SUMATERA SUMATERA UTARA IRIGASI STUDI KELAYAKAN. 3293 3293