On typology and reference conditions for phytoplankton in rivers and lakes in Germany
Ute Mischke; Brigitte Nixdorf; Horst Behrendt
2002
Typology and ecological classification of lakes and rivers / Marja Ruoppa ; Krister Karttunen (eds.). - Kobenhavn, 2002 - (TemaNord ; 2002, 566), S. 44-49