Author

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R. Bartel
7 articles by this author
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Research Article
 Unique: 178 | Total: 212  | Access Period:
 49-58
Research Article
 Unique: 216 | Total: 258  | Access Period:
 65-85
Research Article
 Unique: 182 | Total: 217  | Access Period:
 51-63
Research Article
 Unique: 187 | Total: 221  | Access Period:
 3-20

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