Sonderverl. Gleumes & Co. Koln, Institut für Handels und Verkehrsgeographie. 1 map : col. ; 50 x 37 cm. folded in cover 22 x 13 cm. Scale 1:10,000. "7.25"--Guide, p. 1. Also shows railroads. Some buildings shown pictorially. Accompanied by guide and index (15 p.)