Khaireyah Kh. AL-Hamad and A. R. Khan
American Journal of Environmental Sciences 4 ( 1 ): 31 - 38 , 2008
Bader N. Al-Azmi, V. Nassehi and A. R. Khan
American Journal of Environmental Sciences 4 ( 1 ): 50 - 62 , 2008
L. AL-Awadi, A. R. Khan and R. Al-Kandari
American Journal of Environmental Sciences 4 ( 1 ): 77 - 83 , 2008