TY  - RPRT
TI  - Do migratory flight paths of raptors follow constant geographical or geomagnetic courses?
AU  - K. Thorup
AU  - M. Fuller
AU  - T. Alerstam
AU  - M. Hake
AU  - N. Kjellen
AU  - R. Strandberg
PY  - 2006
DO  - 10.1016/j.anbehav.2006.01.028
UR  - https://pubs.usgs.gov/publication/70028896
ID  - 70028896
ER  -