WAR DEPARTMENT 
CORPS OF ENGINEERS, U. S. ARMY 
AND 
UNITED STATES SHIPPING BOARD 
MISCELLANEOUS SERIES No. 3 
FOREIGN TRADE ZONES 
o (OR FREE PORTS) 
ANALYZED WITH SPECIAL REFERENCE TO THE 
ADVISABILITY OF THEIR ESTABLISHMENT 
IN THE UNITED STATES 
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Prepared by 
THE BOARD OF ENGINEERS FOR RIVERS AND HARBORS 
WAR DEPARTMENT 
and the 
BUREAU OF OPERATIONS 
UNITED STATES SHIPPING BOARD 
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UNITED STATES 
GOVERNMENT PRINTING OFFICE 
WASHINGTON - 1920 .