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3 résultats pour : experimental film preservation

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A National Bureau of Standards worker conducting experiement to help with movie film preservation circa 1938.
UMG21A21_394

A National Bureau of Standards worker conducting e...

A National Bureau of Standards worker conducting experiement to help with movie film preservation - folding endurance test circa 1938.
UMG21A21_395

A National Bureau of Standards worker conducting e...

A National Bureau of Standards worker conducting experiement to help with movie film preservation - resistance testing circa 1938.
UMG21A21_396

A National Bureau of Standards worker conducting e...