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1. Detroit in 1898
1898. Detroit Photographic Co. Supplement to the Detroit journal, September 1st, 1898. Donor: 2240 1 print: halftone; image 14 x 111 cm. This map is in the public domain. Please ...
2. Waterway Locks: United States, 2013
2013. Institute for Water Resources (U.S.). Navigation Data Center. This point shapefile contains the locations of waterways locks in the United States. The Navigation Data Center had several objectives in developin... United States. Bureau of Transportation Statistics.