Author

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H. L. F. Verbraak
4 articles by this author
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Article
 01-04-1981
 Unique: 535 | Total: 919  | Access Period:
 226-227
Article
 01-01-1981
 Unique: 644 | Total: 1097  | Access Period:
 15-24
Article
 01-06-1976
 Unique: 771 | Total: 1155  | Access Period:
 343-346
Article
 01-11-1972
 Unique: 576 | Total: 953  | Access Period:
 473-482

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