http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Vigilance and predator detection vary between avian species with different visual acuity and coverage
Vanessa Tisdale, Esteban Fernandez-Juricic.
Vol. 20, no. 5 (September-October 2009), p. 936-945