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Johnson, Philip.
New York (State)
Educational exhibits, Traveling--New York (State)
Barges--New York (State)
Exhibitions--New York (State)
Newsletters
Slides (photographs)
Photographs
Clippings (information artifacts)
Blueprints
Exhibit scripts
Financial records
Negatives (photographs)
Managing barges (flat-bottomed watercraft)
Documenting exhibitions
Promoting history