Enquiries into the economic, administrative and legal situation of international Air Navigation 

 - Geneva  Series of league Nations Publications        1930 
 - 207 p  cm. 
<br/><br/> L. o. N., 1930, VIII,6 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air
<br/><br/><label>Dewey Class. No.: </label>X43::1:N2, G0/GD