1. 1
   Rules and regulations relating to the navigable waters of the United States

   出版 1939

   Washington : United States Government Printing Office, 1939.

   1 online resource (iii, 469 pages, 71 unnumbered pages of plates (some folded)) : maps, plans.

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2. 2
   Foreign trade zones (or free ports) : analyzed with special reference to the advisability of their establishment in the United States

   出版 1929

   Washington : United States, Government Printing Office, 1929.

   1 online resource (ix, 322 pages, 61 pages of plates, 1 folded leaf of plates) : illustrations, maps, plans.

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