Smith, Emma <br/><br/>
Using secondary data in educational and social research / 
Emma Smith. 
 - 2nd ed. 
 - [New York]:   Open University Press,   [2008].  
 - x, 249 p. :  tables ;  23 cm. 
<br/><br/> Includes appendix (p. 175-232). 
<br/><br/>Includes bibliographical references (p. 233-246). Includes index (p. 247-249). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Έρευνα<br/>Εκπαίδευση
<br/><br/><label>Dewey Class. No.: </label>370.7