Zahid Zainal, Mad Nasir Shamsudin, Zainal Abidin Mohamed, Shehu Usman Adam and Sara Kaffashi
Research Journal of Environmental Sciences 8 ( 6 ): 331 - 341 , 2014
Zahid Zainal, Mad Nasir Shamsudin, Zainal Abidin Mohamed and Shehu Usman Adam
Trends in Applied Sciences Research 7 ( 10 ): 872 - 880 , 2012