"We are probably nearing the limit of all we can know about astronomy."
Simon Newcomb, astronomer ; 1888
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| Number | Title | Issue Date |
| 4411201 | Railway car diaphragm construction Bridging structures are arranged between adjacent cars of trains, for exae high speed, track guided trains or between the sections of buses having at least two sections. A first type of bridging structure provides a sealed walk-through passage between ad... | 10/25/1983 |