Umeh S, Agu G, Okpalla J, Uche E. The use of Lichens in the biomonitoring of heavy metal concentrations in Nnamdi Azikiwe University premises . The Bioscientist [Internet]. 2015Aug.6 [cited 2026Nov.13];3(1):45-. Available from: https://bioscientistjournal.com/index.php/The_Bioscientist/article/view/53