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Lesquereux, Leo. The Flora of the Dakota Group. U.S. Geological Survey.

Lockley, Martin and Adrian Hunt. 1994. Fossil Footprints of the Dinosaur Ridge Area. Friends of Dinosaur Ridge/University of Colorado at Denver.

Rushforth, Samuel R. 1971. A flora from the Dakota Sandstone Formation (Cenomanian) near Westwater, Grand County, Utah. Biological Series. Vol. 14(3).

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Special thanks for valuable assistance to Kristy Alexander, Jill Anderson, Rich Barclay, Donna Braginetz, Tom Fabian, Bob Raynolds, Michele Reynolds, and Pamela Wineman.