✦ LIBER ✦
A system of train signaling, by which also disabled trains may telegraph for assistance without the aid of portable apparatus
✍ Scribed by Charles V. Walker
- Book ID
- 113152654
- Publisher
- Elsevier Science
- Year
- 1858
- Tongue
- English
- Weight
- 129 KB
- Volume
- 65
- Category
- Article
- ISSN
- 0016-0032
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