Trade barriers to knowledge    A manual of regulations affecting educational, scientific and cultural materials 

 -  1951 
<br/><br/><label>Standard No.: </label>67904 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ECONOMICS
<br/><br/><label>Dewey Class. No.: </label>X9M1:53g, J1