SyahbirinG.; DarwisA. A.; SuryaniA.; SyafiiW. The Influence Of Reactant Ratio (Eupcalyptus Lignin – Sodium Bisulfite) And Initial Ph Towards Characteristcs Of Sodium Lignosulfonate. Jurnal Teknologi Industri Pertanian, v. 19, n. 2, 18 May 2010.