1. Dep. of Agricultural Development; Democritus Univ. of Thrace; Pantazidou 193 GR-682 00 Orestiada Greece
2. School of Planning, Architecture, and Civil Engineering, Queen's Univ. Belfast; David Kier Building, Stranmillis Rd. Belfast BT9 5AG UK
3. School of Environmental Sciences and Natural Resources; Faculty of Science and Technology; Univ. Kebangsoon Malaysia; 43600 Bangi Slangor Malaysia