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
Complete description

Post and postal services:
AP: Post Offices are troubled. Letters are sent little

AP: Post Offices are troubled. Letters are sent little
Author: Vojtech Jankovič
Source: www.etrend.sk
Published: 11. 03. 2013 07:59

Angličtina / English

Use translation by Google Translate (no guarantee).

Informácia o pretrvávajúcich globálnych problémoch poštových správ po celom svete: Prepravovanie balíkov nemusí výpadok nahradiť.

Základné informácie:


Author: Vojtech Jankovič
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