World Book's biographical encyclopedia of scientists. Vol 4. 

 - Chicago  World Book  2005 
 - 186 p 
<br/><br/><label>ISBN: </label>071667601X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Scientists--Biography--Encyclopedias, Juvenile. Scientists--Encyclopedias.
<br/><br/><label>LC Class. No.: </label>Q 141 .W67/ Vol 4.