American men of science :  a biographical directory / 
edited by Jaques Cattell 
 - 7th ed. 
 - Lancaster :  Science Press,  c1968 
 - vii, 2033 p. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Scientists--Biography--United States<br/>Scientists--Directories--United States<br/>Scientists--Biography--Canada<br/>Scientists--Directories--Canada<br/>Science--Directories--Canada<br/>Science--Directories--United States
<br/><br/><label>Dewey Class. No.: </label>925