Locking through /
US Army Corps of Engineers, Rock Island District.

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Related Names
United States. Army.
Language(s)
English
Published
Rock Island, Ill. : The District, 1986.
Subjects
Locks (Hydraulic engineering) > United States > Safety measures.
Boats and boating > United States > Safety measures.
Note
Shipping list no.: 86-665-P.
Physical Description
21 p. : ill. (some col.), 1 col. map ; 16 cm.
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