33 1 10 Hair,D Additional Author mixed material Washington,D.C U.S. Government Printing Office Washington, D.C. 1963 Maxwell,E Additional Author mixed material Auckland Whitcombe & Tombs Limited 1950 Bureau of Statistics Additional Author Irshad, M. Additional Author Khan, M. Rafique Additional Author mixed material Lahore Government of the Punjab 1978 Khan,M.A Additional Author Highley, E. Additional Author Champ, B.R. Additional Author mixed material Lahore Government Of The Punjab Forest Department 1985 Winrok International Additional Author Gonzales, L.A. Additional Author Kasryno, F. Additional Author Perez, N.D. Additional Author Rosegrani, M.W. Additional Author mixed material Pakistan Winrock International 1986 Bhatti,I.A Additional Author Konopka, J. Additional Author Bettercourt, E. Additional Author Damaria, A.B. Additional Author mixed material Pakistan Bhatti Publishers, Naya Mohallah Road-Jhelum 1983 Graves, C.R. Additional Author Brown,H.P and Panshin,A.J Additional Author mixed material New York McGraw- Hill Book Company 1949 Heiser, C.B. Additional Author Goodey,J.B. & Goodey,T. Additional Author mixed material London London:Methuen & Co, Ltd; NW: John Wiley & Sons, Inc. 1963 Lowson,J.M and Sahni,B. Additional Author Chen, H.T. Additional Author mixed material London University Tutorial Press Ltd 1960 Huke, R.E. Additional Author Huke, E.H. Additional Author Wackerman,A.E Additional Author mixed material New York McGraw- Hill Book Company, Inc. 1949