| Author | Titles | | 1.
| Siélain, R. 18-? | 1 | | 2.
| Siélain, R. (pseud), 18-? | 0 | | 3.
| Author is: Siélain, R. 18-? | 1 | | 4.
| Siélan, R. 18-? | 0 | | 5.
| Author is: Siélain, R. 18-? | 1 | | 6.
| Siélan, Robert, 18-? | 0 | | 7.
| Author is: Siélain, R. 18-? | 1 | | 8.
| Sielinski, Mikael | 1 | | 9.
| Siem, Wiebke, 1954- | 3 | | 10.
| Siem Wiebke, 1954- | 0 | | 11.
| Author is: Siem, Wiebke, 1954- | 3 | | 12.
| Siemens | 1 | | 13.
| Siemens-Schuckertwerke AG | 1 | | 14.
| Siena. Comune | 1 |
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