Nate Hoogveen, Maquoketa River 3, Paddling Iowa, 2nd ed, Trails Books, Madison, 2006; page 90-91. Includes map.
Ruth Herzberg and John Pearson, Indian Bluffs Primitive Area State Preserve, The Guide to Iowa's State Preserves, University of Iowa Press, 2001; page 75.
U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed May 13, 2011
U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed May 13, 2011
