Ouvrages de Lars Baastrup-Spohr, Peter Holm, Richard V. Lansdown, Bjarne Moeslund, Kaj Sand-Jensen, Jens Christian Schou, Schou, Jens Christia, Klaus van de Weyer, Gerhard Wiegleb

Aquatic Plants of Northern and Central Europe including Britain and Ireland

Lars Baastrup-Spohr, Peter Holm, Richard V. Lansdown, Bjarne Moeslund, Kaj Sand-Jensen, Jens Christian Schou, Schou, Jens Christia, Klaus van de Weyer, Gerhard Wiegleb