WETTEN JCJ VAN & WINTERMANS GJM (1987) NOU: Theme day Fish-eating bird colony. The foraging of Spoonbills on Waddeneilanden. LIMOSA 60 (2): 92-92.

Platalea leucorodia The foraging of Spoonbills on Waddeneilanden JEROEN C. J. VAN WETTEN & GEORGE J. M. WINTERMANS

[free pdf] [dutch summary]