UNESCO <br/><br/>
World guide to science information and documentation service 
UNESCO 
 -  1965 
 - p.  cm. 
<br/><br/><label>Standard No.: </label>59927 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science history
<br/><br/><label>Dewey Class. No.: </label>Ah1:N65a, K5;2