Hebbrt Louis J <br/><br/>
Structure in the social studies 
National Council for the social studies 
 - Washington, USA  National Council for the Social Studies 
 - ix, 110p 
 - Social Studies Readings No 3 .
<br/><br/><label>Source: </label>TextBook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Sciences-Teaching