1. GUINNES´S BOOK OF WORLD RECORDS. (ENGINEERING FEATS) 2. WORLD'S BIGGEST OFFICE COMPLEX. Chicago Merchandise Mart,Illinois, USA. 3. 4. WORLD'S BIGGEST …
1. GUINNES´S BOOK OF WORLD RECORDS. (ENGINEERING FEATS) 2. WORLD'S BIGGEST OFFICE COMPLEX. Chicago Merchandise Mart, Illinois , USA. …