Tariff level indices 

 -  1927 
 - L O N,  1927, II, 34. International Economic Conference, Geneva, 1927, Documentation, 19 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>United States
<br/><br/><label>Dewey Class. No.: </label>X:53:B284, F7