Helletzgruber, Peter, Dipl.-Ing., beh bef u beeid Ziviling f Hochbau Windhabergasse 2 1190 Wien (Wien 19.,Döbling) AT (01) 3 20 50 73-0
Ilieva-Sulovsky, Ivanka, Dipl.-Ing. Budinskygasse 25-29 Stg 1 1190 Wien (Wien 19.,Döbling) AT (01) 3 28 31 91