Retrieved April 29, 2015. ↑ Soleri, Paolo (1973), The Bridge Between Matter & Spirit is Matter Becoming Spirit; The Arcology of Paolo Soleri, Garden City, New York: Anchor Books, p. 46, ISBN 978-0-385-02361-0 . ↑ Wright, Frank Lloyd, "An Organic Architecture" ↑ Soleri, Paolo, "Arcology: The City in the Image of Man" ↑ Kane, Frank (November 6, 2005). "British to help China build 'eco-cities'". The Guardian.