noah akpan sunday, Usman S, Alao OJ, Omisakin OO, Olawale AF. Preliminary Investigation on Production of Brown Ink from Gmelina arborea (ROXB) Fruit Extract. IJSBAR [Internet]. 2014 Aug. 29 [cited 2024 Jul. 23];18(1):297-303. Available from: https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/2132