Nwafor PA, Ekpo E, Udofia EE, Smith ME. Effects of Methanol Extract of <em>Piper umbellatum</em> Leaves on Contraceptive and Sexual Behaviour in Rodents. NIJOPHASR [Internet]. 2012 Jul. 1 [cited 2024 Nov. 24];1(2):1-14. Available from: https://nijophasr.net/index.php/nijophasr/article/view/20