United States. Bureau of Outdoor Recreation. Lake Central Region.

• National urban recreation study, Chicago/Gary
• National urban recreation study, Cincinnati/Hamilton
• National urban recreation study, Detroit/Ann Arbor
• Proposed north country trail from the Appalachian Trail to the proposed Lewis and Clark Trail
• The upper Mississippi
• Water-oriented outdoor recreation in the Lake Huron Basin, Michigan
• Water-oriented outdoor recreation in the Lake Michigan Basin
• Water-oriented outdoor recreation in the Lake Ontario Basin, New York - Pennsylvania