Weeks, Mary Elvira,  1892- <br/><br/>
Discovery of the elements / 
completely rev. and new material added by Henry M. Leicester. ; illus. collected by F. B. Dains 
 - 7th ed. 
 - Pennsylvania :  Journal of Chemical Education,  1968 
 - x, 896 p. :  ill., ports. ;  24 cm. 
<br/><br/>Includes bibliographies 
<br/><br/><label>LCCN: </label>68-15217 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemical elements<br/>Chemistry--History<br/>Chemists