Blough, Glenn Orlando. <br/><br/>
Elementary-school science and how to teach it 
Glenn O. Blough, Julius Schwartz, Albert J. Huggett. 
 - Rev. ed. 
 - New York  Dryden Press  1958. 
 - 608 p.  ill.  27 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>LCCN: </label>588549 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching.
<br/><br/><label>LC Class. No.: </label>Q181  / .B558 
<br/><br/><label>Dewey Class. No.: </label>372.35  / B657e 1958