Kubler, George.  <br/><br/>
The indian caste of Peru, 1795-1940 :   a population study based upon tax : records and census reports /   Libro 
by George Kubler.  
 - Washington, D.C. :   Smithsonian Institution : United States Government,   1952.  
 - vi, 71 p. ;   26 cm.  
<br/><br/> Catalogación preliminar.   Texto en inglés.