1. Notes on East Greenland birds, with a discussion of the periodic non-breeding among Arctic birds;BERTRAM;Ibis,1934
2. Some remarks on non-breeding in the Arctic, especially in north-west Greenland;BIRD;Ibis,1940
3. The reproductive cycles of the British and Continental races of the Starling;BULLOUGH;Phil. Trans. Roy. Soc. Lond. (B),1942
4. Non-breeding in the Fulmar Fulmarus glacialis;DUFFEY;Scot. Nat.,1950
5. Field studies on the Fulmar Fulmarus glacialis;DUFFEY;Ibis,1951