U.S. Great Lakes ports :
statistics for overseas and Canadian waterborne commerce /
produced by the St. Lawrence Seaway Development Corporation.
New York : GRC Data Corporation.
1974- statistics for current quarter and year to date for the navigation season; 1979- annual for navigation season.
Based on data collected by the U.S. Bureau of the Census Foreign Trade Division.
22 x 29 cm.
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|Full view1974:mar-jun||Northwestern University|
|Full view1974:july-sept||Northwestern University|
|Full viewOct,1974/jan,1975||Northwestern University|