Hafstrom, John E. <br/><br/>
Basic Concepts in modern mathematics 

 - Primera Edición 
 - Inglaterra  ,Addison-wesley publishing company, inc.  .1963 
 - 195 páginas  figuras  23 cms. 
<br/><br/>Introduction. The natural numbersets, variables, andstatement forms. Mapping and operations. Groups  Relations and partitions. The integers.. The rational numbers. The real nombers. 
<br/><br/><br/>En ingles. 
<br/><br/><label>Subjects--Index Terms: </label>Basic concepts in modern mathematics 
<br/><br/><label>Dewey Class. No.: </label>510  / H138