https://web.archive.org/web/20171003174942/https://www.elwis.de/BfS/bfs_start.php?target=3&source=2&db_id=154536

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GP San Marino 1989 - 1. Training

https://web.archive.org/web/20130930000302/http://www.motorsportarchiv.de/f1/saison/1989/2/traini01.shtml

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