Collaborators:

• Mr. N. Abu-Jaber, Yarmouk University, Jordan.
• Dr. Ü. Akkmek, Istanbul University, Turkey.
• Dr. A. Aloui, Institute of Sylvo-pastoral, Abarka, Tunisia.
• Mr. F. Asmer, RDNR, Ministry of Agriculture, Lebanon.
• Dr. N. Erkan, Forest Research Institute, Turkey.
• Dr. P. F. Ffolliott, SNR, The University of Arizona, Tucson.
• Mr. R. J. Freitas, IALC, The University of Arizona, Tucson.
• Dr. G. M. Garfin, ISPE, The University of Arizona, Tucson.
• Dr. M. K. Hughes, LTRR, The University of Arizona,Tucson.
• Dr. P. I. Kuniholm, Cornell University, New York.
• Mr. J. Lukas, INSTAAR, University of Colorado, Boulder.
• Dr. J. Luterbacher, Institute of Geography and NCCR Climate, University of Bern.
• Dr. D. M. Meko, LTRR, The University of Arizona, Tucson.
• Dr. M. Sabir, National School of Forest Engineering, Morocco.
• Mr. M. Shahbaz, Badia Research and Development Programme, Jordan.
• Mr. J. Stephan, RDNR, Ministry of Agriculture, Lebanon.
• Dr. T. W. Swetnam, LTRR, The University of Arizona, Tucson.
• Dr. C. Woodhouse, NOAA National Climatic Data Center, University of Colorado, Boulder.
• Dr. E. Xoplaki, Institute of Geography and NCCR Climate, University of Bern.