13 1 10 Darlington,C.D and Mather,K Additional Author Brush, E. G. Additional Author Sands, D.M. Additional Author Gapasin, D.P. Additional Author Mabesa, V.L. Additional Author mixed material London George Allen & Unwin, Ltd. 1952 Cleghorn,H Additional Author mixed material London W.H. Allen & Co., 7 Leadenhall Street. 1851 1) Nasira Habib Additional Author Wani,B.A Additional Author mixed material Pakistan Forestry Planning and Development Project Ministry of Food, Agriculutre & Livestock Government of Pa 1994 Dye,T.R Additional Author Ilkkaracan, I. Additional Author Appleton, H. Additional Author mixed material New Jersey Prentice-Hall Inc. Englewood Clifts, 1987 Balagapo, N. Additional Author Aisha Rahat Ullah Additional Author mixed material Peshawar Pakistan Forest Institute, Peshawar 2005 Nagy, J.G. Additional Author G. Farid Sabir Additional Author Castillo, C.D. Additional Author Waser,K.V and Hutchinson,B.S Additional Author mixed material Rome FAO, of the United Nation 1995 Mclean,R.C and Ivimey-cook,W.R. Additional Author mixed material London Macmillan Publishing Co, & Collier Macmillan Publishers London 1952 Farzana Masood Additional Author Mahjabeen Additional Author Fritsch,F.E. Additional Author mixed material London Cambridge University Press 1959 Shabnam Bahar Additional Author Alexopoulos,C.J Additional Author mixed material New York John Wiley & Sons, Inc. 1962 Ali, M.M. Additional Author Ahmad, N. Additional Author Alexopoulos,C.J Additional Author mixed material New York John Wiley & Sons, Inc. 1962