Gispen Metalen meubelen, Cat. no. 51.
Rott. etc., Gispen's Fabriek voor Metaalbewerking N.V., (1931), 16 p., 41 photogr. Ills., orig. stapled wr. des. by W.H. Gispen.
Cf. Berens, ill. 034. A fine copy of this very rare and sought after trade catalogue.