| WORK CITED |
| Cambell, Neil A. Reece, Jane B. and Mitchell, Laurence G. Biology. Menlo Park: Benjamin/Cummings, 1999. Kremples, Dana M. Tiptoe Through the Taxa: A guide tour though the kingdom of living organisms. Boston: Pearson Custom Publishing, 2000. "Introduction to Penicillin." Microsoft Encarta Encyclopedia 2000. CD- ROM. Microsoft: Seatle, 2000. |