Nasir, N. and Yahya, N. and Akhtar, M.N. and Kashif, M. and Shafie, A. and Daud, H. and Zaid, H.M.  (2011) Magnitude verses offset study with EM transmitter in different resistive medium.  Journal of Applied Sciences, 11 (7).  pp. 1309-1314.  ISSN 18125654