(Suggested Citation: U.S. Department of Transportation, Bureau of Transportation Statistics; and, U.S. Department of Commerce, U.S. Census Bureau. (2015-06). 2012 Commodity Flow Survey Datasets: 2012 CFS Public Use File (PUF). Accessed [enter date you downloaded file here] from https://www.census.gov/data/datasets/2012/econ/cfs/historical-datasets.html )