Marine mammals of the Wadden Sea : final report of the section "Marine Mammals" of the Wadden Sea Working Group - Reijnders, P.J.H.; Wolff, W.J. (Wim J.); Wadden Sea Working Group (Rotterdam : A. A. Balkema, 1982)
Includes bibliographies
Keywords: Marine mammals -- Netherlands -- Waddenzee; Mammals -- Netherlands -- Waddenzee