TY - BOOK TI - Free-living ciliates of river Tisa and its tributaries T3 - Tiscia monograph series T3 - The Upper Tisa valley : preparatory proposal for Ramsar site designation and an ecological background Hungarian, Romanian, Slovakian and Ukrainian co-operation AU - Kovalchuk Andrey PY - 1999 LA - English SN - 1418-0448 UR - http://acta.bibl.u-szeged.hu/10210/1/tiscia_mono_004_361-382.pdf ER -