Changes
Subtitle: teacher's guide
By: Science and technology for children [and] National Science Resources Center, Smithsonian Institution, National Academy of Sciences.
Contributors: Science and Technology for Children (Project); National Science Resources Center (U.S.); Carolina Biological Supply Company.
Publisher: Carolina Biological Supply Company
Published: 1997
Place of publication: Burlington, NC
Language: eng
Number of pages: 199
Subjects: Science -- Study and teaching (Elementary).
Notes: Includes bibliographical references (p. 183-187).