Esler, William K. <br/><br/>
Teaching elementary science / 
Mary K. Esler 
 - Belmot :  Wadsworth publishing company,  1996       
 - v 608 p. 
<br/><br/><label>ISBN: </label>0534505112 
<br/><br/><label>LC Class. No.: </label>LB 1585 E76t 1996