Sutherland, Mary Ethel <br/><br/>
One-step problem patterns and their relation to problem solving in arithmetic. 

 - New York  Columbia University  1947. 
 - 170 p. 
<br/><br/><label>ISBN: </label>0404559255 (ed. 1972) 
<br/><br/><label>LCCN: </label>91177734  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching.<br/>Arithmetic--Problems, exercises, etc.
<br/><br/><label>LC Class. No.: </label>QA135.5  / .S93 1947 
<br/><br/><label>Dewey Class. No.: </label>372.7/2/044