“Preliminary Screening of Selected Phytochemicals and Analysis of Essential Trace Elements in Boswellia Serrata Roxb, Prosopis Africana and Sclerocarya Birrea: Plants With Therapeutic Potentials to Treat Hemorrhoids”. Journal of Pure & Applied Sciences , vol. 18, no. 2, Aug. 2019, https://doi.org/10.51984/jopas.v18i2.275.