Chaudkary, Rehman, A.; M. Akram; K. H. Gill; M. Akram Qazi'(Faisalabad: Institute of Soil & Environmental Sciences University of Agriculture, Faisalabad. Pakistan, 2001-12-14)
S. M. Mian; M. Akram; K. H. Gill; Z. Ahmad(Faisalabad: Institute of Soil & Environmental Sciences University of Agriculture, Faisalabad. Pakistan, 2001-10-11)