File:Arnold (1913) pg 251 - Four-track sub-level unit section.jpg
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English: Figure 58 - Four-track sub-level unit section. Center local tracks at high level; side express tracks at sub-level, well suited to Market Street. |
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| Source | Arnold, Bion J. (March 1913) "11. Market Street extension tunnel under Twin Peaks" in Report on the Improvement and Development of the Transportation Facilities of San Francisco, pp. 225–270 Retrieved on 17 April 2018. | |||
| Author | Uncredited illustrator(s), drafter(s), and photographer(s). First published by and generally credited to Bion Arnold | |||
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This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 18:01, 27 July 2018 | | 2,144 × 1,327 (310 KB) | SteinsplitterBot (talk | contribs) | Bot: Image rotated by 90° |
| 14:37, 27 July 2018 |  | 1,327 × 2,149 (312 KB) | Mliu92 (talk | contribs) | User created page with UploadWizard |
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