Hurd Paul DeHart  1905 <br/><br/>
New directions in teaching secondary school science / 
Paul Dehart Hurd 
 - Chicago:  Rand McNally,  1969. 
 - 239 p.  21 cm. 
 - Rand McNally education series. .
<br/><br/><label>ISBN: </label>69017209  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching Secondary
<br/><br/><label>LC Class. No.: </label>Q181  
<br/><br/><label>Dewey Class. No.: </label>607/.1/2