Author

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R. Bartel
7 articles by this author
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Research Article
 Unique: 49 | Total: 59  | Access Period:
 49-58
Research Article
 Unique: 69 | Total: 76  | Access Period:
 65-85
Research Article
 Unique: 54 | Total: 66  | Access Period:
 51-63
Research Article
 Unique: 43 | Total: 48  | Access Period:
 3-20

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