[1]
akpan sunday noah, S. Usman, O. J. Alao, O. O. Omisakin, and A. F. Olawale, “Preliminary Investigation on Production of Brown Ink from Gmelina arborea (ROXB) Fruit Extract”, IJSBAR, vol. 18, no. 1, pp. 297–303, Aug. 2014.