Massialas, Byron G., 1929- <br/><br/>
Social studies in a new era  the elementary school as a laboratory 
Byron G. Massialas, Joseph B. Hurst 
 - New York  Longman  1978 
 - ix, 501 p. : ill. ; 24 cm. 
<br/><br/><label>ISBN: </label>0582280435 
<br/><br/><label>LCCN: </label>77-017716 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Study and teaching (Elementary)--United States<br/>Group work in education