• 10 Steenbock Library

• 20 Maps, Atlases
• 7 Books

• 10 Central business districts
• 6 Parks
• 2 National parks and reserves
• 1 Bicycle trails
• 1 Cycling
• 1 E635
• 1 Fortification
• 1 Hiking
• 1 Historic sites
• 1 History
• 1 Maps
• 1 Shuttle services
• 1 Trails

• 26 United States. National Park Service
• 1 Hotel Harrington (Washington, D.C.)
• 1 Parks and History Association
• 1 United States. Office of National Capital Parks

• 27 English
• 2 Spanish
• 1 French
• 1 German
• 1 Italian
• 1 Japanese

• 8 Washington (D.C.) Region
• 8 Washington Region
• 6 Rock Creek Park
• 6 Rock Creek Park (Washington, D.C.)
• 1 Theodore Roosevelt Island
• 1 Theodore Roosevelt Island (Washington, D.C.)
• 1 Washington (D.C.) Metropolitan Area
• 1 Washington Metropolitan Area

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