Thyne, James M <br/><br/>
Patterns of error in the addition number facts / 
By James M Thyne 
 - London :  University of London Press,  c1954 
 - xx, 275 p. ;  23 cm. 
 - Publications of the Scottish Council for Research in Education,  37 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching.
<br/><br/><label>Dewey Class. No.: </label>372.72  / THP 1954