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Photography in Philately

A Krzysztof K. Słowiński Collection

Mora 1987.jpg Markocki 1958Miniaturesletter-1 KOELNMESSE 06Markocki 1958Miniaturesletter-1 KOELNMESSE 06Markocki 1958Miniaturesletter-1 KOELNMESSE 06Markocki 1958Miniaturesletter-1 KOELNMESSE 06

= Example of Dr. Czesław MORA's scientific paper =

It's an article "The lith Process. The problem of the Light-sensitive material quality and its measurement".

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