by F.M.A. Rind1, , , , , , and, M.G.H. Laghari1, A.H. Memon1, U.R. Mughal, F. Almani1, N. Memon1, M.Y. Khuhawar2, M.L. Maheshwari2
Published in Pakistan journal of analytical and environmental chemistry (01.06.2008)