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2 - How to Search The SAO/NASA Astrophysics Data System Abstract Service provides a gateway to the online Astronomy and Physics literature. You can navigate this content using a number of query interfaces, which allow you to search one or more of its databases: Astronomy and Astrophysics, Physics, and ArXiv e-prints.       2.1 - Basic Query Form             2.1.1 - General Search Hints             2.1.2 - Year Range Searching             2.1.3 - Author Search             2.1.4 - Phrase Search             2.1.5 - Identifier Search             2.1.6 - Basic Search Plugin       2.2 - Abstract Query Form             2.2.1 - Introduction                   2.2.1.1 - Synonyms                   2.2.1.2 - Stop Words                   2.2.1.3 - Search Word Translations                   2.2.1.4 - Phrase Searches                   2.2.1.5 - Wildcard Searches             2.2.2 - Search Fields                   2.2.2.1 - Authors                   2.2.2.2 - SIMBAD/NED/ADS Object Names/Position                   2.2.2.3 - Publication Date                   2.2.2.4 - Title                   2.2.2.5 - Abstract Text                   2.2.2.6 - Number of Abstracts to Return             2.2.3 - Filters                   2.2.3.1 - Entry Date                   2.2.3.2 - Minimum Score                   2.2.3.3 - Select References From                   2.2.3.4 - Select References With                   2.2.3.5 - Select References From Group             2.2.4 - Sorting                   2.2.4.1 - Sort by Score                   2.2.4.2 - Sort by Normalized Score                   2.2.4.3 - Sort by Citation Count                   2.2.4.4 - Sort by Normalized Citation Count                   2.2.4.5 - Sort by First Author Name                   2.2.4.6 - Sort by Date (most Recent First)                   2.2.4.7 - Sort by Date (oldest First)                   2.2.4.8 - Sort by Entry Date             2.2.5 - Settings                   2.2.5.1 - Require Field For Selection                   2.2.5.2 - Synonym Replacement                   2.2.5.3 - Relative Weights                   2.2.5.4 - Use For Weighting                   2.2.5.5 - Weighted Scoring                   2.2.5.6 - Example             2.2.6 - Saving Queries             2.2.7 - Query Logic                   2.2.7.1 - OR Queries                   2.2.7.2 - AND Queries                   2.2.7.3 - Simple Logic Queries                   2.2.7.4 - Full Boolean Queries       2.3 - The Experimental Topic Search Interface             2.3.1 - Keyword Searches             2.3.2 - Subject Area Searches       2.4 - Searching by Reference Information             2.4.1 - Searching by Journal/Volume/Page             2.4.2 - Searching by Reference             2.4.3 - Searching by Bibcode       2.5 - Current/Unread Journals             2.5.1 - Current Journals             2.5.2 - Unread Journals       2.6 - Searching for Scanned Journals/Proceedings       2.7 - Searching Lists of Terms and Authors             2.7.1 - Exact Author Query Form             2.7.2 - Abstract Service List Query             2.7.3 - Object List Query       2.8 - Searching the ADS by Email             2.8.1 - Command Interface             2.8.2 - HTML Forms Interface             2.8.3 - Email Article Retrieval       2.9 - What's New Service
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