== Example of Katedra/Zakład Fototechniki's cooperation with the industry in the 1960s ==

The letter of February 1968 from the Silesian Factory of Incandescent Lamps HELIOS [Śląska Fabryka Lamp Żarowych HELIOS] is an order to test the performance of prototype colored bulbs to be used as a photographic darkroom safelight.

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czwartek 5 wrzesień 2019

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• Covers / Europa East / Poland / Special appearance / Homage to Professor Witold ROMER

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