The antibacterial activity and some trace elemental compositions of the extracts of Piliostigma thonningii, a widely used ethnomedicinal tree in Minna, Nigeria - Etsuyankpa, M B; Ndamitso, M M; Suleman, M AT; Tijani, J O; Idris, S; Shaba, E Y; Mohammed, A (Afr J Microbiol Res, 2013)