Prologue

1. Jepsen, G. L. (1964). "Riddles of the Terrible Lizards." American Scientist 52: 227-246. (p. 231)

2. Leakey, M. (1996). Personal communication.

3. Dodson, P. (1990). "Counting Dinosaurs; How Many Kinds Were There?" Proceedings of the National Academy of Sciences of the United States of America 87: 7608-7612.

4. Gartner, S., and J. P. McGuirk (1979). "Terminal Cretaceous Extinction Scenario for a Catastrophe." Science 206: 1272-1276. (p. 1276)

5. Eliot, T. S. (1952). The Complete Poems and Plays. New York: Harcourt, Brace and Company, (p. 59)

6. Russell, D. A. (1979). "The Enigma of the Extinction of the Dinosaurs." Annual Review of Earth and Planetary Sciences 7: 163-182.

8. Kuhn, T. S. (1970). The Structure of Scientific Revolutions. Chicago: University of Chicago Press.

9. Shoemaker, E. M. (1984). "Response to Award of Gilbert Medal." Bulletin of the Geological Society of America 95: 1002.

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