What do we know about light?
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Jiří Šrámek
Commentary (voice)
Jiří Čeleda
Idea
Alois Jiráček
Director of Photography
Jarmil Burghauser
Original Music Composer
Josef Soukup
Production Manager
Marie Čulíková
Editor
Josef Kuba
Idea
Bohumil Vošahlík
Director
Josef Plíva
Screenplay