Statistical digest 1981 :  a statistical summary of data on education, science and technology, culture and communication, by country 

 - 323 p. 
<br/><br/><label>ISBN: </label>92-3-101994-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educação<br/>Cultura<br/>Estatística
<br/><br/><label>Universal Decimal Class. No.: </label>310  / S797