Ungers, O. M. Oswald Mathias Ungers : the dialectic city / Dialectic city Stefan Vieths. - 119 pages : illustrations ; 21 cm ISBN: 8881182114 9788881182114 Subjects--Personal Names: Ungers, O. M. Subjects--Topical Terms: Architecture--GermanyCity planning--Germany Dewey Class. No.: 720.92