Graphic symbols for railroad maps and profiles /
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| Format: | Book |
| Language: | English |
| Published: |
New York, New York :
American Society of Mechanical Engineers,
c1972.
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| Subjects: |
| Item Description: | Datos tomados de la cubierta. A la cabeza de la cubierta: American National Standard. "Revision of ANSI Y32.7-1957". |
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| Physical Description: | vii, 28 páginas : ilustraciones ; 28 cm. |