Stamatis, G. “GROUNDWATER QUALITY OF THE AG. PARASKEVI/TEMPI VALLEY KARSTIC SPRINGS - APPLICATION OF A TRACING TEST FOR RESEARCH OF THE MICROBIAL POLLUTIO (KATO OLYMPOS/NE THESSALY)”. Bulletin of the Geological Society of Greece, vol. 43, no. 4, Jan. 2010, pp. 1868-77, doi:10.12681/bgsg.11378.