1. Orientation, migration routes and flight behavior of knots, turnstones and brant geese departing from Iceland in spring;Alerstam;Arctic,1990
2. The social life of animals.;Allee,1938
3. The grouping of nocturnal passerine migrants;Balcomb;Auk,1977
4. Fall migration on the Gaspe Peninsula;Ball;Peabody Mus Nat Hist Bull,1952