Author

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R. Bartel
7 articles by this author
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Research Article
 Unique: 507 | Total: 632  | Access Period:
 49-58
Research Article
 Unique: 528 | Total: 638  | Access Period:
 65-85
Research Article
 Unique: 625 | Total: 745  | Access Period:
 51-63
Research Article
 Unique: 614 | Total: 760  | Access Period:
 3-20

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