Illustration of a geological cross-section of the Golden Gate Bridge, San Francisco, USA. From the report of the Chief Engineer to the Board of Directors of the Golden Gate Bridge and Highway District, California, September, 1937. | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Photostock-Israel |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |