File:Arnold (1913) pg 247 - Standard four-track subway section (cropped).jpg

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Description
English: Figure 56 - Standard four-track subway section. Depressed for mezzanine concourse crossing between sidewalk entrances. Double island platforms.
Date
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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Public domain
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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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Arnold_(1913)_pg_247_-_Standard_four-track_subway_section_(cropped).jpg

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current18:27, 1 August 2018Thumbnail for version as of 18:27, 1 August 20181,522 × 1,056 (243 KB)Mliu92 (talk | contribs)File:Arnold (1913) pg 247 - Standard four-track subway section.jpg cropped 29 % horizontally, 20 % vertically using CropTool with precise mode.

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