TY - BOOK TI - Hydrogeographical features of the Upper Tisa river-system 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 - Andó Mihály PY - 1999 LA - English SN - 1418-0448 UR - http://acta.bibl.u-szeged.hu/10199/1/tiscia_mono_004_135-172.pdf ER -