HELLEBREKERS WPJ (1962) Oölogy and Nidology communications, 1960-II and 1961: Together nesting of Mallard Anas, Common Pheasant and Common Teal. LIMOSA 35 (1): 155-156.
Mallard Anas platyrhynchos Common Pheasant Phasianus colchicus Common Teal Anas crecca
