pH, hardness and elemental profile if rain water : zinc roofing sheet vs open air collection

World Scientific News, Tom 24 (2015) s. 56-60
M. Fadilu, M.K. Atiku, M.M. Barau, M.A. Abubakar, K. Salahu, I. Ibrahim, T.A. Owolorafe, T.A. Lawal