Title: Diving and snorkeling guide to the Great Lakes
Subjects: Scuba diving, Guidebooks, Skin diving, Sub-aqua swimming, Travel & holiday guides, United States - General, Great Lakes Region, Travel - United States, Travel, North America, Scuba & Snorkeling, United States - Midwest - General, Great Lakes (North America), Special Interest - Adventure, Great Lakes
Places: Great Lakes (North America), Great Lakes Region (North America)