13 1 10 Anon Additional Author Longley, D. Additional Author Shain, M. Additional Author mixed material Pakistan Ministry Of Home & Kashmir Affairs 1961 concept and applications Zorkoczy, P. Additional Author Hornung,M and Skeffington,R.A Additional Author mixed material London Institute of Terrestrial Ecology 1993 Needed Adjustment Miastkowski, S. Additional Author Lent, A.F. Additional Author Lowa State University Additional Author mixed material Lowa, USA Lowa State University Press 1961 Ahuja, V. Additional Author Levitt,J Additional Author mixed material New York Academic Press,Inc 1972 Casselbery, R. Additional Author Baker, D. Additional Author Ramasubramanian, K. Additional Author Rigg, J. Additional Author Chrispeels,M.J Additional Author mixed material San Francisco W.H. Freeman and Company 1977 5) Cowart, R. Additional Author Gunther,F.A Additional Author mixed material Heidelberg Springer-Verlag Berlin Heidelberg 1964 Sherman, K. Additional Author United State Agency for International Development Additional Author mixed material Washington,D.C United State Agency for International Development 1980 Longley, D. Additional Author Shain, M. Additional Author Agricultural Census Organization Additional Author mixed material Lahore Agricultural Census Organization 1980 Underdahl, B. Additional Author Willett, E. Additional Author Pearson,N.L Additional Author mixed material Washington,D.C U.S. Department of Agriculture 1955 Tauber, D.A. Additional Author Kienan, B. Additional Author Holzschlag, M.E. Additional Author Porte,W.S Additional Author mixed material Washington,D.C US Department of Agriculture 1955