Author: Reijnders, P.J.M.:
Title: On the causes of the decrease in the harbour seal (Phoca vitulina) population in the Dutch Wadden Sea. Population dynamics and tissue levels of heavy metal and organochlore compounds.
Description: Wageningen 1980. 8vo, 22.7cm. Pp. [xiv],[108], diagrs., tabs., refs. Orig. wrs. - Thesis, incorporating four papers published in journals previously.

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