Educational research in classrooms and schools  a manual of materials and methods 
compiled by Louis Cohen 
 - London  Harper & Row  1976 
 - xvi, 426 p ill 26 cm 
<br/><br/>Includes bibliographies and index 
<br/><br/><label>ISBN: </label>0063180472 
<br/><br/><label>LCCN: </label>76-27714 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational research