Puerto Rican-Virgin Islands trade study  a regulatory staff analysis. 

 - Washington  For Sale by the Supt. of Docs., U.S. Govt. Print. Off.  1970. 
 - vii, 251 2p.  ill. 
<br/><br/>Bibliography : p. 245-251. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Transportation--Puerto Rico.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Economic conditions--1918-