1. Field studies of the orientation cue hierarchy of nocturnal songbird migrants;Able,1978
2. Mechanisms of orientation, navigation and homing;Able,1980
3. The role of polarized light in migratory orientation of White throated Sparrows (Zonotrichia albicollis);Able;Nature, Lond.,1982
4. Sun compass orientation in a nocturnal migrant, the White-throated Sparrow;Able;Condor,1977
5. Bird Migration in Relation to Wind and Topography;Alerstam,1976