@book{ Solr-acta58088, title = {Duckweed covers lemnetalia minoris}, series = {Tiscia monograph series}, series = {Vegetation and fauna of Tisza river basin III.}, author = {Szirmai Orsolya}, year = {2019}, url = {http://acta.bibl.u-szeged.hu/58088/1/tiscia_mono_011_005-012.pdf} }