Ecology of duck populations in the island group to Valassaaret, Gulf of Bothnia
By: Olavi Hildén
Contributors: Helsingin yliopisto
Publisher: Tekijä
Published: 1964
Place of publication: Helsinki
Language: eng
Number of pages: 279
Notes: Repr. from Annales zoologici. Fennici. Vol. 1. 1964.

Thesis (doctoral)--Helsingin yliopisto, 1964.