Set of 15 books or booklets on Citroën, including : - Pierre BERCOT, Mes années aux usines Citroën, Edition la pensée universelle, 1977, Langres, dedicated by the author; - Roger GUYIOT and Christophe BONNAUD, 60 de style et de prototypes Citroën, Edition Roger Régis, 1993, Tours, signed by the authors and the Citroën France club; - Jacques WOLGENSINGER, André Citroën, Flammarion edition, 1991, autographed by the author; - Roger GUYIOT and Christophe BONNAUD, 80 ans de futur, Edition Roger Regis, Paris, 1999; - Paris-Moscow-Pekin, Catapac edition, 1992.