The Effects of Gradient Velocity and Detention time to Coagulation Flocculation of Dyes and Organic Compound in Deep Well Water = Pengaruh Kecepatan Gradien dan Waktu Tinggal Terhadap Koagulasi - flokulasi Warna dan.. - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2008)