- Cărți electroniceThe Adductor Muscles of the Jaw In Some Primitive ReptilesRichard C. Fox
- Cărți electroniceTwo New Pelycosaurs from the Lower Permian of OklahomaRichard C. Fox
- Cărți electroniceThe Adductor Muscles of the Jaw In Some Primitive ReptilesRichard C. Fox
- Cărți electroniceThe Adductor Muscles of the Jaw In Some Primitive ReptilesRichard C. Fox
- Cărți electroniceTwo New Pelycosaurs from the Lower Permian of OklahomaRichard C. Fox
- Cărți electroniceTwo New Pelycosaurs from the Lower Permian of OklahomaRichard C. Fox