Bibliography

This is a state by state listing. The following areas are listed for Wisconsin: Apostle Islands National Lakeshore, Chequamegon National Forest, Horicon National Wildlife Refuge, Lower St. Croix National Scenic Riverway, Necedah National Wildlife Refuge, Nicolet National Forest, St. Croix National Scenic Riverway, Trempealeau National Wildlife Refuge, and Upper Mississippi River National Wildlife and Fish Refuge.