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Sturrock, P. (1999). The UFO enigma: A new review of the physical evidence. New York: Warner Books.
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Campbell, P. (2000). Alien encounters [Electronic version]. Brookfield, CT: Millbrook.
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Michin, D. (2001). Introduction of Exotic Species. In Encyclopedia of ocean sciences (Vol. 2, pp. 877-889). New York: Academic Press.
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Creswell, J. (2001). See this goop? It kills anthrax. Fortune, 144, 147-148.
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Pimentel, D., Lach, L., & Zuniga, R. (2000). Environmental and economic costs of nonindigenous species in the United States. BioScience, 50(1), 53-65.
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Buggs, S. (2001, December 18). Texas lawmaker to introduce bill to protect employee savings. Houston Chronicle, p.A1.
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DeTrude, J.A. & Stanfield, V.S. (2000). Sucessful women leaders: Achieving resiliency through rituals and resources. Advancing Women in Leadership, 3. Retrieved February 4, 2002, from http://www.advancingwomen.com/awl/awl.html
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Jaroff, L. (2000). A winning combination. Time Atlantic, 156, 66-69. Retrieved December 20, 2001, from Academic Search Premier database.
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Averhoff, F., Shapiro, C., Bell, B., Hyams, I., Burd, L., Deladisma, A., et al. (2001). Control of Hepatitis A through routine vaccination of children [Electronic version]. JAMA, 286, 2968-2973.
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University of Houston System. (1999, February 5). Community Impact Report. Retrieved December 19, 2001, from http://www.uhsa.uh.edu/community/impact/education.html