Trends of Migratory and Wintering Waterbirds in the Wadden Sea 1987/1988-2016/2017

by Romke Kleefstra, Menno Hornman, Thomas Bregnballe, John Frikke, Klaus Günther, Bernd Hälterlein, Peter Körber, Jürgen Ludwig, Gregor Scheiffarth · 2019