Author

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J. A. Burggraaff
21 articles by this author
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Article
 01-05-1981
 Unique: 900 | Total: 1406  | Access Period:
 246-246
Article
 01-12-1980
 Unique: 873 | Total: 1378  | Access Period:
 544-545
Article
 01-03-1980
 Unique: 1068 | Total: 2096  | Access Period:
 102-105
Article
 01-12-1979
 Unique: 928 | Total: 1515  | Access Period:
 554-562
Article
 01-04-1978
 Unique: 828 | Total: 1297  | Access Period:
 162-168
Article
 01-06-1977
 Unique: 843 | Total: 1384  | Access Period:
 274-281
Article
 01-03-1977
 Unique: 811 | Total: 1304  | Access Period:
 98-103
Article
 01-02-1976
 Unique: 819 | Total: 1270  | Access Period:
 104-116
Article
 01-01-1976
 Unique: 817 | Total: 1313  | Access Period:
 55-57
Article
 01-01-1976
 Unique: 946 | Total: 1524  | Access Period:
 5-12
Article
 01-11-1975
 Unique: 802 | Total: 1299  | Access Period:
 446-448

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