The social sciences :  the supply of and demand for documentation and data : a report to UNESCO 

 - 138 p. 
<br/><br/><label>ISBN: </label>0-946138-00-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>sistemas
<br/><br/><label>Universal Decimal Class. No.: </label>025.5:3  / S678