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Books about Letzel:
ADHS? Ein Buch von Kindern von Jörg Letzel (2011) Broschiert by Jörg Letzel (1000)
Wiki information Letzel:
Jan Letzel was a Czech architect, most famous for designing a building in Hiroshima whose ruins are now the A-Bomb Dome or Peace Memorial.
6266 Letzel is a main-belt asteroid discovered on October 4, 1986 by A. Mrkos at Klet.