biostratigraphy of Cretaceous freshwater rays, Wahweap Formation and John Henry Member of the StraightCliffsFormation, southern Utah." Abstracts with Programs -
biostratigraphy of Cretaceous freshwater rays, Wahweap Formation and John Henry Member of the StraightCliffsFormation, southern Utah. Geological Society of America
Science Fiction Film (1972), ed. William Johnson, pp. 74–76. Englewood Cliffs, N.J.: Prentice-Hall. ISBN 0-13-795161-2 Cagin, Seth, and Philip Dray (1984)