On the nesting of the goldeneye, Bucephala clangula (L.), in the Meltaus game research area in Northern Finland, 1959-1966

by Paavo Rajala, Tapani Ormio, Per Andersson, Matti Valtonen, Tapio Raitis, Ilkka Koivisto, Erkki Haukioja, Markku Haukioja