Trojcak, Doris A. <br/><br/>
Science with children / 
by Doris A. Trojcak 
 - New York :  McGraw-Hill,  1979. 
<br/><br/><label>ISBN: </label>0070652171 
<br/><br/><label>Subjects--Index Terms: </label>Education - Presecondary Scienc Teaching