Eyton (Thomas Campbell) ― Osteologia avium. A sketch of osteology of birds. Wellington, Salop : R. Hobson, 1867.
http://www.biodiversitylibrary.org/item/129309#page/117/mode/1up
Eyton (Thomas Campbell) ― Osteologia avium. A sketch of osteology of birds. Wellington, Salop : R. Hobson, 1867.
http://www.biodiversitylibrary.org/item/129309#page/117/mode/1up