13 1 10 Levin, R.I. Additional Author Kirkpatrick, C.A. Additional Author Rubin, D.S. Additional Author Wyatt-Smith,J Additional Author mixed material Malayan Malayan Forest Service 1960 Hurlbut,C.S Additional Author Buffa, E.S. Additional Author mixed material New York John Wiley & Sons 1972 Lahee,F.H Additional Author Buffa, E.S. Additional Author mixed material New York McGraw- Hill Book Company 1959 Vasudevan, N. Additional Author Row,C and Fasick,C Additional Author mixed material Ogden, Utah USDA Forest Service 1965 Anderson, D.R. Additional Author Hussain,R.W and Abbas,S.H Additional Author mixed material Peshawar Pakistan Forest Institute, Peshawar 1980 Hall, O.P. Additional Author Enters,T Additional Author mixed material Bangkok FAO, of the United Nation 2001 1) Convey, John Additional Author Blalock,H,M Additional Author mixed material Singapore McGraw- Hill Book Company Singapore 1960 Qazi,I.A and Cheema M.A Additional Author Agrawal, R.C.. Additional Author mixed material Pakistan Pakistan Forest Institute, Peshawar 1974 Churchman,C.W, Ackoff,R.L and Arnoff,E.L Additional Author mixed material New York John Wiley & Son, Inc. 1957 Plyusnin,I.I Additional Author Taha, H.A. Additional Author mixed material Moscow Foreign Languages Publishing House 1966