Upper Cretaceous and Tertiary formations of the western part of the San Juan Basin, Colorado and New Mexico,
by John B. Reeside, Jr., and Flora of the Animas Formation, by F.H. Knowlton.
- Washington, Govt. Print. Off., 1924.
- iv, 117 p. XIX pl. (part fold.; incl. col.map, 3 fold.-diagr.) tables, diagrs. 29 cm.
Plates not included in pagination. At head of title: Department of the Interior.