World conference on science :  Science for the twenty-first century a new commitment. 

 - Paris :  UNESCO,  2000. 
 - 544 p. 
<br/><br/><label>ISBN: </label>1903598001 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 5: 6 (100) "2000" WOR