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

 - Paris :  UNESCO,  1981. 
 - [xviii], 323 p. ;  22 cm. 
<br/><br/>311  311 
<br/><br/><label>ISBN: </label>92-3-101994-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vital statistics.
<br/><br/><label>Dewey Class. No.: </label>313 / U2