Zauro, S. A., Dabai, M. U., Tsafe, A. I., Umar, K. J. and Lawal, A. M. (2013) “EXTENT OF SOME HEAVY METALS CONTAMINATION IN SOIL OF FARMLANDS AROUND SOKOTO METROPOLIS”, European Scientific Journal, ESJ, 9(3). doi: 10.19044/esj.2013.v9n3p%p.