Okik Hendriyanto Cahyonugroho, Euis Nurul Hidayah, Yayok Suryo Purnomo. 2015. “CHARACTERISATION OF NATURAL ORGANIC MATTER IN COAGULATION PROCESS BY USING SIZE EXCLUSION CHROMATOGRAPHY”. International Journal of Research Science and Management 2 (10):1-4. http://ijrsm.com/index.php/journal-ijrsm/article/view/646.