Vernissage conjoint du livre de Jean-Christophe Graz : «The Power of Standards. Hybrid Authority and the Globalisation of Services» et du livre de JoAnne Yates et de Craig N. Murphy : «Engineering Rules. Global Standard Setting since 1880» / Joint opening of the book by Jean-Christophe Graz : "The Power of Standards. Hybrid Authority and the Globalisation of Services" and the book by JoAnne Yates and Craig N. Murphy: "Engineering Rules. Global Standard Setting since 1880"