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  • 1. U.S. Government Printing Office: Federal Digital System (FDsys)

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  • 2. udn讀書館

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    56 1 489
  • 3. udn讀書館PDA(Patron-Driven Acquisitions)使用選購(2024年)

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    5 0 541
  • 4. Ullmann's Encyclopedia of Industrial Chemistry

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  • 5. Ulrich's Periodicals Directory (Ulrichsweb)

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  • 6. UNdata

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  • 7. UpToDate

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    777 15 8107
  • 8. UpToDate Lexidrug 臨床藥學資料庫 (原名 Lexicomp)

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    47 0 2093
  • 9. USDA National Agricultural Library Collection

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  • 10. USPTO Patent Public Search tool

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