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| | Peter Wettstein |
 | | Kreuzende Wege, a collaboration with Werner Bärtschi, Ulrich Gasser, Max E. Keller, Martin Sigrist; may be performed separately); |
 | | Rotondo, oboe, bassoon, trumpet, trombone, viola, double bass, piano, accordion, percussion, 1998-99 (collaboration with Werner Bärtschi, Ulrich Gasser, Max E. |
 | | Propriumsteile der Pfingstmesse, a collaboration with Gerald Bennett, Josef Haselbach, Heinz Holliger, Hans Ulrich Lehmann, Jacques Wildberger; may be performed separately); |
| composers21.com /compdocs/wettstep.htm (567 words) |
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