When blue is blue

Scientific treatise and study on the composition of the paint on the Protectorate 5h blue linden leaf stamp. Study of the dependence of the amount of paint on the color shade of postage stamps.

03. 05. 2025
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Postage stamps as history textbooks

Postage stamps as history textbooks
Author: Vojtech Jankovič
Source: www.radio.cz
Published: 08. 09. 2012 08:00

Angličtina / English

Use translation by Google Translate (no guarantee).

Pohľad na známky ako zdroj informácií o histórii (propagácia medzinárodného zberateľského veľtrhu Sběratel 2012).

Základné informácie:


Author: Vojtech Jankovič
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