@misc{MischkeRiedmuellerHoehnetal.2017, author = {Ute Mischke and Ursula Riedm{\"u}ller and Eberhard Hoehn and Brigitte Nixdorf}, title = {Handbuch Phyto-See-Index - Verfahrensbeschreibung f{\"u}r die Bewertung von Seen mittels Phytoplankton}, institution = {FG Gew{\"a}sser{\"o}kologie}, type = {workingpaper}, year = {2017}, }