Science Problem / 
Wilbur L. Beauchamp... [ et. all. ]. 
 - New youk :  Scott, Foresman and Company,  1946. 
 - 756 p.. :  ills;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>507.6  / SCI 1939