TY  - RPRT
TI  - Falcon versus grouse: flight adaptations of a predator and its prey
AU  - C.J. Pennycuick
AU  - M.R. Fuller
AU  - J.J. Oar
AU  - S.J. Kirkpatrick
PY  - 1994
UR  - https://pubs.usgs.gov/publication/5222727
ID  - 5222727
ER  -