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| Gerd Nolden, Mario Simons and Silke Kremer at the regional competition "Jugend forscht" | Gerd, Silke and Mario present their radio telescope at the state contest in Leverkusen | back: Gerd, supervisor Walter Stein, Mario, front: Karl-Heinz Hoesgen and Silke at the state contest "Jugend forscht" |
