AZANU, David; OPPONG, Agnes. Interlaboratory Comparison Exercise for the Determination of Copper and Lead in Ghana. International Conference on Applied Science and Technology Conference Proceedings, [S.l.], v. 5, n. 1, p. 11 - 19, apr. 2019. ISSN 2467-902X. Available at: <https://conference.kstu.edu.gh/index.php/proceedings/article/view/113>. Date accessed: 20 june 2019.