"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 |
| 5511186 | System and methods for performing multi-source searches over heterogeneous databases System and methods for performing search and retrieval operations over multiple databases, the system and methods being suitable for use in combination with databases of different kinds managed by different database management systems, the system and meth... | 04/23/1996 |