Teichert, C. 1990. The end-Permian extinction. In Extinction Events in Earth History, edited by E. Kauffman and O. Walliser, 161-190. New York: Springer-Verlag.
Towe, К. М. 1994. Earth’s early atmosphere: Constraints and opportunities for early evolution. In Early Life on Earth, edited by S. Bengston, 36-47. Nobel Symposium no. 84. New York: Columbia University Press.
Valentine, J. W. 1994. Late Precambrian bilaterians: Grades and clades. Proceedings of the National Academy of Sciences U. S. A. 91: 6751-6757.
Valentine, J. W., D. H. Erwin, and D. Jablonski. 1996. Developmental evolution of metazoan body plans: The fossil evidence. Developmental Biology 173: 373-381.
van Andel, Т. Н. 1985. New Views on an Old Planet. Cambridge: Cambridge University Press.
Vermeij, G. 1991. When biotas meet: Understanding biotic interchange. Science 253: 1099-1103.
Walker, J. C. G. 1977 Evolution of the Atmosphere. London: Macmillan.
Ward, P. 1990. The Cretaceous/Tertiary extinctions in the marine realm: A 1990 perspective: In Global Catastrophes in Earth History, edited by V. Sharpton and P. Ward, 425-432. Special Paper 247. Boulder, CO: Geological Society of America.
Ward, P. 1994. The End of Evolution. New York: Bantam Doubleday Dell.
Ward, P., and D. Brownlee. 2000. Rare Earth: Why Complex Life Is Uncommon in the Universe. New York: Copernicus (Springer Verlag).
Ward, P., and W. Kennedy. 1993. Maastrichtian ammonites from the Biscay region (France and Spain). Journal of Paleontology, Memoir 34 67.
Ward, P., W. J. Kennedy, K. MacLeod, and J. Mount. 1991. Ammonite and inoceramid bivalve extinction patterns in Cretaceous-Tertiary boundary sections of the Biscay Region (southwest France, northern Spain). Geology 19:1181.
Ward, P. D. 1990. A review of Maastrichtian ammonite ranges. In Global Catastrophes in Earth History, edited by V. Sharpton and P. Ward, 519-530. Special Paper 247. Boulder, CO: Geological Society of America.
Whitmore, T. 1990. An Introduction to Tropical Rain Forests. Oxford: Oxford University Press.
Wilmer, P. 1990. Invertebrate Relationships: Patterns in Animal Evolution. Cambridge: Cambridge University Press.
Wilson, E. 1992. The Diversity of Life. Cambridge, MA: Harvard University Press.
Woese, C. R. 1987. Bacterial evolution. Microbiological Reviews 51: 221-271.
Woese, C. R., O. Kandler, and M. L. Wheelis. 1990. Towards a natural system of organisms: Proposal for the domains Archaea, Bacteria, and Eucarya. Proceedings of the National Academy of Sciences U.S.A. 87: 4576-4579.