Block 5 Classification and measurement 

 - Milton Keynes:  The Open University,  1979. 
 -  164p. 
<br/><br/> PB 
<br/><br/><br/>Eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social science-Research-Methodology
<br/><br/><label>Dewey Class. No.: </label>300.72  / BLO