Jacobson, Williard J. <br/><br/>
Investigating in science/ 
Willard J. Jacobson, Cecilia J. Lauby, Richard D. Konicek 
 - New York:  American Book Co.  1965 
 - 1v.  illus. 
 - Thinking ahead in science .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Text books