organised by the Bulgarian Society for the Conservation of the Rhodopi Mountains (BSCRM) and the World Wide Fund for Nature (WWF-International) ; [compiled by Dimo Datkov Bodurov, and others]
prepared for United States Agency for International Development under contract number PDC-5517-1-00-0105-00 ; prepared by Tropical Research & Development, Inc., John A. Lichte ... [and others]