The Vertebrata of the Tertiary Formations of the West (1884), often called "Cope's Bible"
Aadaankii Ugu Qadiimsanaa ee Laga Duubo "Kacbada Sharafta Leh" 1884 oo Dhawaan Laga Helay Jaamcaddan Reer Galbeedka Ah (Muuqaal) - Goobjoog Education