8 1 10 Abdul Qayyum Additional Author mixed material Peshawar PFI 1977 A. Rahman Khan Additional Author Abdul Qayyum Additional Author Mohammad Ashraf Additional Author Sporne,K.R Additional Author mixed material London Hutchinson University Library 1970 Abdul Qayyum Additional Author Haji Khan Keerio Additional Author Stewart,J.L, Allison,G.E and Simons,A.J Additional Author mixed material London Oxford Forestry Institute 1996 Abdul Qayyum Additional Author Allah Ditto Gopang Additional Author Ehrenberg,C.E Additional Author mixed material Russia Skogshogskolan 1963 Kennedy, E.T. Additional Author Pinstrup-Andersen, P. Additional Author Abdul Qayyum Chaudhary Additional Author mixed material Peshawar PFI 1983 Zahoor Ahmad Additional Author Muhammad Afzal Additional Author Abdul Qayyum Additional Author Alexopoulos,C.J Additional Author M. Sadiq Bhatti Additional Author mixed material New York John Wiley & Sons, Inc. 1962 Hobbs, P.R. Additional Author Abdul Qayyum Additional Author Byerlee, D. Additional Author Smith,P.G Additional Author Mohammad Ramzan Akhtar Additional Author Abdul Majid Additional Author mixed material London Butter Worths 1964 Abdul Qayyum Additional Author Nasir, E Additional Author Abdul Rahman Khan Additional Author Dueck, J. Additional Author Muhammad Nasir Additional Author mixed material Rawalpindi Stewart Herbarium, Gordon College, 1972