Science indicators. 

 - Washington :  National science board, National science foundation,  1983-. 
 - v. :  il.  ;  28 cm. 
<br/><br/> Report of the National science board 
<br/><br/>Ed. anterior: Science and engineering indicators. Inventario: 35056 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INVESTIGACIONES -ORGANIZACION -ESTADOS UNIDOS<br/>ESTADOS UNIDOS -INVESTIGACIONES -ORGANIZACION
<br/><br/><label>Universal Decimal Class. No.: </label>001.89(73)