Underhill, Robert G. <br/><br/>
Diagnosing mathematical difficulties 
Robert G. Underhill, editor, A. Edward Uprichard, James W. Heddens. 
 - Columbus, Ohio  Merrill  c1980. 
 - ix, 392 p.  ill. 
<br/><br/> 920902 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>0675081955 
<br/><br/><label>LCCN: </label>79090124  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Remedial teaching.
<br/><br/><label>LC Class. No.: </label>QA11  / .U43 
<br/><br/><label>Dewey Class. No.: </label>372.7