- A 1926
German private commercial overprint for IX
Leipziger Briefmarken-Handlermesse....
- 1964.
Stamp Collecting World See for
example Spezialkatalog uber die
Briefmarken der Schweiz...Zumstein & Cie, Bern 1967.
Stamp Collecting World's Swiss...
- Heinz; Stark,
Eberhard (1983). "Möbius-Bänder: ...und natürlich auch auf
Briefmarken".
Praxis der Mathematik. 25 (7): 207–215. MR 0720681. Thulaseedas, Jolly;...
- [[:de:Postgeschichte und
Briefmarken von Island]]; see its
history for attribution. You may also add the
template {{Translated|de|Postgeschichte und
Briefmarken von Island}}...
- Creighton.edu. 1990-12-11.
Retrieved 2012-03-24. "Stamp
collection Monaco Briefmarken N° 868 Mint NH". La
Maison du Collectionneur. "Stamp: Hare and the tortoise...
- The Kohl
Briefmarken-Handbuch was a
seminal work of
philatelic literature first published in
Germany in 1923 as the 11th
edition of the
previous well...
- The
Michel catalog (MICHEL-
Briefmarken-Katalog) is the
largest and best-known
stamp catalog in the German-speaking world.
First published in 1910, it...
- 1977-1980 (1981); Vol. 3: 1981-1986 (1986) Heutger,
Nicolaus C.
Vatikanische Briefmarken:
Kunst und Geschichte. Göttingen: Philapress, 1966 66p. Kehr, Ernest...
-
Street Journal.
Retrieved 15
April 2022. Jörg, Heinrich. "Ukraine-Post:
Briefmarken zeigen Russland den Mittelfinge". W&V 13
April 2022 (in German). Archived...
- 10, 2018. "Deutsches Reich,
Michel Nr. 819,
postfrisch -
Briefmarken Holsten". www.
briefmarken.cc.
Retrieved 2019-02-05.
Official Guide booklet, 2002,...
