Author

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R. Burgert
17 articles by this author
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Article
 01-02-1972
 Unique: 558 | Total: 929  | Access Period:
 34-43
Article
 01-11-1970
 Unique: 550 | Total: 892  | Access Period:
 402-405
Article
 01-10-1955
 Unique: 592 | Total: 937  | Access Period:
 412-417
Article
 01-09-1955
 Unique: 576 | Total: 887  | Access Period:
 361-365

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