Brownell, William Arthur <br/><br/>
Meaningful vs. mechanical learning  a study in grade III subtraction by William A. Brownell and Harold E. Moser 
with the assistance of Samuel L. Abbot, Jr. [and others] 
 - Durham, N.C.  Duke Univ. Press  1949. 
 - xvi, 207 p.  diagrs.  24 cm. 
 - Duke University research studies in education  no. 8 .
 - Duke University.  Duke University research studies in education  no. 8. .
<br/><br/>"Chapter bibliography": p. 23-24. Bibliography: p. [160] 
<br/><br/><label>LCCN: </label>49009408  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subtraction.<br/>Learning, Psychology of
<br/><br/><label>LC Class. No.: </label>QA115  / .B86 
<br/><br/><label>Dewey Class. No.: </label>372.7