[1]
N. Tierney, R. A. Tierney, Þorvaldur Björnsson, Y. Kolbeinsson, S. E. Townsend, and A. Petersen, “Status and distribution of the Common Shelduck Tadorna tadorna in Iceland, with special reference to the core area in Borgarfjörður”, Wildfowl, pp. 127–147, Nov. 2020.