Ellsworth, Ruth  <br/><br/>
Improving the social studies curriculum / 
by Ruth Ellsworth and Ole Sand  
 -  National Council for Social science, 
 - 268p. : 
<br/><br/> 26th Yearbook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / ELL.I