Sally, Judith D., <br/><br/>
Roots to research :  a vertical development of mathematical problems / 
Judith D. Sally, Paul J. Sally, Jr. 
 - xiii, 338 páginas : 
<br/><br/><label>ISBN: </label>9780821844038 (papel alcalino) 0821844032 (papel alcalino) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Matemáticas--Investigación
<br/><br/><label>LC Class. No.: </label>QA11.2  / S345 
<br/><br/><label>Dewey Class. No.: </label>510.72