| Original title | Hvorfor |
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| Danish title | Hvorfor |
| International titles | Why |
| Efnisorð | Fysik, 1960-1969 |
| Leikstjórn | Erik Frohn Nielsen |
| Screenplay | Jørgen Sønderhousen, Erik Frohn Nielsen |
| Director of Photography | Erik Wittrup Willumsen |
| Editor | Erik Frohn Nielsen, Susanne Varming |
| Appearance | Jørgen Weel |
| Land | Danmark |
| Domestic distribution | Statens Filmcentral |
| Technical info | 295 meter, 35 mm, Sort-hvid, Tone |
Companies |
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| Production company | Nordisk Kortfilm |
| Commissioned by | Dansk Kulturfilm |
| Domestic distribution | Statens Filmcentral |
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Instruktion |
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| Instruktion | Erik Frohn Nielsen |
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Manus |
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| Manus | Jørgen Sønderhousen |
| Manus | Erik Frohn Nielsen |
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Foto |
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| Foto | Erik Wittrup Willumsen |
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Klip |
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| Klip | Erik Frohn Nielsen |
| Klip | Susanne Varming |
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Speaker |
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| Speaker | Jørgen Weel |
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Medvirkende |
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| Medvirkende | Jørgen Weel |
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| Type | Source | Forfatter | tíma |
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| Program i farve |
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