Patsia, A., & Lazaridou, M. (?????.).  (2006).  The Water Quality Upstream and Downstream of the Lithotopos Dam (Strymon River). ??? 10th International Congress on the Zoogeography and Ecology of Greece and Adjacent Regions. ????????????? ??? 26-30 June, Patras: Hellenic Zoological Society, Hellenic Ornithological Society, Hellenic Ministry of Rural Development, Section of Animal Biology (Dept. Of Biology, Univ. of Patras).