Proceedings, National Academy of Sciences of the United States of America 

 - CHICAGO, ill. :  NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 
 - Quincenal 
<br/><br/><label>ISSN: </label>0027-8424 
 = Proceedings, National Academy of Sciences of the United States of America 
 = PROC. NATL. ACAD. SCI. USA 
<br/><br/><label>Subjects--Index Terms: </label>CIENCIAS EN GENERAL