Spencer, Francis A. <br/><br/>
Air mail payment and the government. 

 - Washington, D.C.  Brookings Institution  1941. 
 - xii 402 p.  illus. 
 - Publication / Institute of Economics of the Brookings Institution  no. 87 .
 - Publication (Brookings Institution. Institute of Economics)  no. 87. .
<br/><br/><label>LCCN: </label>91050791  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Air mail service--U.S.<br/>Aeronautics, Commercial--U.S.
<br/><br/><label>LC Class. No.: </label>Microfilm 88/3405 (H)