Cohen Louis <br/><br/>
Educational research in classrooms and schools: A manual of materials and methods 

 - London, UK  Harper and Row  1976 
 - xvi,426p 
<br/><br/><label>ISBN: </label>0-06-318047-2 
<br/><br/><label>Source: </label>TextBook 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research-Education