Similar to ScienceDirect

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  双子のパラドックス

  Twin paradox
  
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  物質移動合意書

  Material transfer agreement
  
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  物質構造科学研究所

  
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  沸点上昇

  Boiling-point elevation
  
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  Biodiversity Heritage Library

  Biodiversity Heritage Library
  
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  BookFi

  
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  CINAHL

  CINAHL
  
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  中国知網

  CNKI
  
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  Contextual Query Language

  Contextual Query Language
  
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  DBLP

  DBLP
  
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  E-International Relations

  E-International Relations
  
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  Google Scholar

  Google Scholar
  
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  HAL (公開アーカイブ)

  HAL (open archive)
  
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  Library Genesis

  Library Genesis
  
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  PubMed

  PubMed
  ▲1 trends

  
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  Semantic Scholar

  Semantic Scholar
  
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  What Works Clearinghouse

  What Works Clearinghouse
  
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  WorldCat

  WorldCat
  
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  ZbMATH

  ZbMATH Open
  
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  I-Scover

  
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  医中誌Web

  
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  Espacenet

  Espacenet
  
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  カルチュラル・ジャパン

  
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  Google ブックス

  Google Books
  
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  CiNii

  CiNii
  ▲1 trends

  
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  Sci-Hub

  Sci-Hub
  
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  Journal@rchive

  
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  J-GLOBAL