11 1 10 Hurlbut,C.S Additional Author Brusick, D. Additional Author mixed material New York John Wiley & Sons 1972 Wright,J.W. Additional Author Gardner, E.J. Additional Author mixed material New York Academic Press 1976 Harrison,J.L Additional Author Berenblum, I. Additional Author mixed material Edinburgh Oliver & Boyd 1951 Abercrombie, M. Additional Author Brachet, J. Additional Author King, T.J. Additional Author Qazi,I.A and Cheema M.A Additional Author mixed material Pakistan Pakistan Forest Institute, Peshawar 1974 Hillman, J.S. Additional Author Darlington,C.D and Matber,K. Additional Author mixed material London George Allen & Unwin Ltd 1950 Khattak,G.M Additional Author Stevenson, F.J. Additional Author mixed material Peshawar Ferozsons (Peshawar) Ltd 1971 Lindsay,A.D Additional Author Cleton, F.J. Additional Author Simons, J.W.I.M. Additional Author mixed material Canberra Commonwealth Government Printer, Canberra 1931 Bonner,J.T Additional Author mixed material New Jersey Princeton University Press 1952 Robards, A.W. Additional Author Little,J.M Additional Author mixed material San Francisco A. Carlisle and Co 1940 Sparre, P. venema, S.C. Additional Author Sinnott,E.W Additional Author mixed material New York McGraw- Hill Book Company, Inc. 1960