Caldwell, William Elmer,  1903- <br/><br/>
Keynotes  chemistry simplified 
by William E. Caldwell 
 - New York  Barnes & Noble  1968 
 - 2 v. ; 27 cm. 
<br/><br/><label>LCCN: </label>68-020695 //r69 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Problems, exercises, etc