American men of sciences; a biographical directory. <br/><br/>
American men of sciences  a biographical directory.11ed. 

 - 11ed. 
 - New York - EEUU  Bowker  1967 
 -  29 cm 
 -   .
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<br/><br/><label>Subjects--Topical Terms: </label>--Ciencias--Directorio Biografico--<br/>Ciencias