TY  - RPRT
TI  - Why do migrating birds fly along coastlines?
AU  - T Alerstam
AU  - S G Pettersson
PY  - 1977
DO  - 10.1016/0022-5193(77)90016-9
UR  - https://pubmed.ncbi.nlm.nih.gov/875399/
ID  - 875399
ER  -