Production year
1934
© Fonds historique / CNRS Images
Reference
19000001_0949
Spectre d'un aimant trempé, photographié le 7 mai 1934. ONRSII
Spectre d'un aimant trempé, photographié le 7 mai 1934. Office national des recherches scientifiques et industrielles et des inventions (ONRSII).
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