| Title: | American railway signaling principles and practices. Chapter 1, History and development of railway signaling. |
| Author: | Association of American Railroads. Signal Section |
| Note: | Signal Section, A.A.R., 1953 |
| Link: | page images at HathiTrust; US access only |
| 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: | Railroads -- Signaling -- History |
| Subject: | Railroads -- United States -- Signaling |
| Other copies: | Look for editions of this book at your library, or elsewhere. |
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