Author

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R. Bartel
7 articles by this author
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Research Article
 Unique: 84 | Total: 111  | Access Period:
 49-58
Research Article
 Unique: 112 | Total: 141  | Access Period:
 65-85
Research Article
 Unique: 97 | Total: 123  | Access Period:
 51-63
Research Article
 Unique: 86 | Total: 107  | Access Period:
 3-20

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