| Title: | Train operation by signal indication. I. The two principal methods of directing train movements. II. Directing train movements by signal indication. |
| Author: | Sperry, Henry Muhlenberg, 1861- |
| Note: | H. M. Sperry, 1920 |
| Link: | page images at HathiTrust |
| No stable link: | This is an uncurated book entry from our extended bookshelves, readable online now but without a stable link here. You should not bookmark this page, but you can request that we add this book to our curated collection, which has stable links. |
| Subject: | Railroad trains |
| Subject: | Railroads -- Signaling |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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