Schweiz (in German). Hallwag. p. 251. ISBN 3444103352. Bundesnetzagentur: Weltpostverein (UPU). (in German). Retrieved 24 December 2023. "General Postal Union;... 15 KB (402 words) - 21:49, 9 April 2024 |
Schweiz (in German). Hallwag. p. 251. ISBN 3444103352. Bundesnetzagentur: Weltpostverein (UPU). (in German). Retrieved 24 December 2023. "General Postal Union;... 15 KB (402 words) - 21:49, 9 April 2024 |