- Data from Numbers, habitat use, activity system and behaviour of the Purple Sandpiper (Calidris maritima) and the Turnstone (Arenaria interpres) on the Flemish coast, Belgium, 1947-2005-Marc Becuwe, Paul Lingier, Raymond Deman, Georges De Putter, Koen Devos, Guido Rappé en Peter Sys, meer
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