(1973). Zero: [Originally publ. in Germany in 1958 and 1961 by Otto Piene and Heinz Mack] ([Reprint der Zero-Kataloge 1. 2. 3. 1958-1961 von Otto Piene u. Heinz Mack].). DuMont Schauberg.

Zero: [Originally Publ. in Germany in 1958 and 1961 by Otto Piene and Heinz Mack]. [Reprint der Zero-Kataloge 1. 2. 3. 1958-1961 von Otto Piene u. Heinz Mack]. Köln: DuMont Schauberg, 1973.

Zero: [Originally Publ. in Germany in 1958 and 1961 by Otto Piene and Heinz Mack]. [Reprint der Zero-Kataloge 1. 2. 3. 1958-1961 von Otto Piene u. Heinz Mack]. DuMont Schauberg, 1973.