GBERIKON, G. M.; IYOULA, F. I.; ICHOR, S. T. Effect of Bitter Leaves Extract on Bacteria Isolated from Soils of Some Mechanic and non-Mechanic Sites in Makurdi Metropolis. International Journal of Applied Sciences and Biotechnology, v. 7, n. 1, p. 81-87, 26 mar. 2019.