Description
Item Description:"Funded by the U.S. Department of Education, Office of Educational Research and Improvement."
"Project 2061, American Association for the Advancement of Science ; NSTA, National Science Teachers Association"--Cover.
Shipping list number: 96-96-0137-P.
"ENC 96-011"--P. [4] of cover.
Physical Description:v, 64 pages : illustrations ; 28 cm.
Bibliography:Includes bibliographical references (pages 55-61).