Current research and development in scientific documentation no.9 / 
National science foundation office of Science information Service U. S 
 - Washington :  National Science Foundation, Office of Scientific Information,  [n.d.] 
 - xii, 270 p. ;  27 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> USD 1.25 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information storage and retrieval systems--Science--Periodicals<br/>Machine translating--Periodicals<br/>Documentation--Periodicals
<br/><br/><label>Dewey Class. No.: </label>006