Marine mammal surveys in Dutch North Sea waters in 2015 Authors Geelhoed, S.C.V. Lagerveld, S. Verdaat, J.P. Publication Date Jan 01, 2015 Source Wageningen University and Researchcenter Publications Keywords Aquatic Ecology Marine Mammals Netherlands North Sea Surveys Aquatische Ecologie Karteringen Nederland Noordzee Zeezoogdieren Language English License Unknown External links Full record on research.wur.nl