1. Geologic framework of the ground-water system in Jurassic and Cretaceous rocks in the northern Great Plains, in parts of Montana, North Dakota, South Dakota, and Wyoming Author/Creator: Anna, Lawrence O. Publication/Creation: For sale by the Distribution Branch, U.S. Geological Survey Resource Type: Book Access & Availability: Loading
2. A guide to the identification of Jurassic dinoflagellate cysts Author/Creator: Sarjeant, William Antony S. Publication/Creation: Baton Rouge : School of Geoscience, Louisiana State University, 1978 Resource Type: Book Access & Availability: Loading