1. Birds of the North Atlantic and Newfoundland Banks in July and August, 1950;Bagenal;Br. Birds,1951
2. A North Atlantic transect in September;Browne;Br. Birds,1958
3. Falco colusilbarius subaesalon Brehm: a valid race;Butterfield;Br. Birds,1954
4. Birds of the North Atlantic in March;Cusa;Br. Birds,1949