World science report 1993 / 
UNESCO. 
 - Paris :   UNESCO,  c 1993. 
 - 278 p. :  ill. ;  30 cm. 
<br/><br/>86  86 
<br/><br/><label>ISBN: </label>92-3-102938-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reports--World science.
<br/><br/><label>Dewey Class. No.: </label>500 / U2w