Germs : mysterious microorganisms /
by Don Nardo.
- San Diego, CA : Lucent Books, c1991.
- 96 p. : ill. (some col.) ; 26 cm.
- The Encyclopedia of discovery and invention .
Includes bibliographical references (p. 89-90) and index.
Discusses the nature and function of germs and how they can be responsible for both good and bad effects.