• 10 Videos, Slides, Films

• 6 Conservation of natural resources
• 6 Environmental policy
• 6 Natural resources
• 5 Transportation
• 3 City traffic
• 2 Horse-drawn vehicles
• 2 Street-railroads
• 2 Streets
• 1 Aeronautics
• 1 Congestion pricing
• 1 Environmental aspects
• 1 Food
• 1 Grand Central Terminal (New York, N.Y.)
• 1 Pedestrians
• 1 Railroads, Elevated
• 1 Stream restoration
• 1 Subway stations
• 1 Subways
• 1 Synthetic fuels
• 1 Trucks
• 1 Vehicles

• 6 Films Media Group
• 6 Films for the Humanities & Sciences (Firm)
• 6 Infobase
• 6 Public Broadcasting Service (U.S.)
• 4 Alexander Street Press
• 4 American Mutoscope and Biograph Company
• 1 Bitzer, G. W., 1872-1944
• 1 Bonine, R. (Robert K.)
• 1 Marvin, Arthur W., 1861-1911
• 1 Pollan, Michael

• 10 English

• 4 New York
• 4 New York (State)
• 2 Broadway (New York, N.Y.)
• 1 Grand Central Terminal (New York, N.Y.)
• 1 London (England)
• 1 Portland (Or.)
• 1 Seoul (Korea)
• 1 Union Square (New York, N.Y.)

• 6 Educational films
• 6 Videorecording

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