Aquatic plants of Northern and Central Europe including Britain and Ireland - Schou, Jens Christian 1954-; Moeslund, Bjarne 1954-; Weyer, Klaus van de 1961-; Lansdown, Richard 1962-; Wiegleb, Gerhard 1948-; Holm, Peter 1953-; Baastrup-Spohr, Lars 1982-; Sand-Jensen, Kaj 1950- (WILDGuides, 2023)