Opinion | Christo's Umbrellas Took Over My First Months in New York - The New York Times
Christo's Umbrellas - YouTube
Christo and Jeanne-Claude, The Umbrellas Japan-USA (Hand Signed) from the private collection of Jeanne-Claude's former assistant, 1991 - Alpha 137 Gallery
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Gallery of Never-Seen-Before Work of Christo and Jeanne-Claude on Display at the Hexton Gallery in Colorado - 5