Muhammad Iqbal, Muhammad Ali Chang, Abid Mahmood, Muhammad Zafar Iqbal, Mahmood-ul- Hassan and Noor-ul- Islam
Asian Journal of Plant Sciences 2 ( 3 ): 325 - 330 , 2003
Muhammad Iqbal, Muhammad Ali Chang, Muhammad Zafar Iqbal, Mahmood-ul- Hassan, Abdul Nasir and Noor-ul- Islam
Journal of Agronomy 2 ( 3 ): 160 - 168 , 2003