Shafqat Nawaz; N. Alchtar; M. Aslam; R. H. Qureshi; J. Akhtar(Faisalabad: Institute of Soil & Environmental Sciences University of Agriculture, Faisalabad. Pakistan, 2002-02-05)
Muhammad Aslam; R. H. Qureshi; R. Mahmood; S. Nawaz; Javaid Akhtar(Faisalabad: Institute of Soil & Environmental Sciences University of Agriculture, Faisalabad. Pakistan, 2001-11-12)