Ascher, Marcia. <br/><br/>
Code of the Quipu :   A Study in Media, Mathematics and Culture. 

 - Michigan :   University of Michigan Press,   1981. 
 - 166 p.  ;   28 cm. 
<br/><br/> Empastado. 
<br/><br/>Contenido: Odyssey -- How to make a Quipu -- Inca Insistence -- The Quipumaker -- Format, Category and Summation -- Hierarchy and Pattern -- Arithmetical ideas and recurrent numbers -- A piece of string 
<br/><br/><label>Dewey Class. No.: </label>511.2