Humphrys, L.G. <br/><br/>
Science Through Experience : 3 

 - London:  Blond Educational,  1969. 
 - 148p.;  ill.  23cm 
<br/><br/><label>ISBN: </label>219516669 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Education, Research, Related Topics
<br/><br/><label>Dewey Class. No.: </label>507  / HUM