Doris, Ellen. <br/><br/>
Doing what scientists do :  Children learn to investigate their world / 
Ellen Doris. 
 - Portsmouth :  Heinemann,  c1991. 
 - 191 p. 
<br/><br/><label>ISBN: </label>0435083090 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching (Elementary)--United States.
<br/><br/><label>LC Class. No.: </label>LB1585.3  / .D67