Walter Zapp (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Walter Zapp" in English language version.

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minox.com

"Walter Zapp". MINOX. Retrieved 2021-05-12.

post.ee

"EUROPA. Eesti patendid/ 072-06-1994". Postmargid. Eesti Post. Retrieved 25 August 2013.

president.ee

Teenetemärkide kavalerid: Walter Zapp Retrieved 24 August 2013.

skorovs.lv

peteris.skorovs.lv

Pēteris Skorovs (6 January 2014). "Minox Patents". Historical patents. Retrieved 24 February 2014.

submin.com

"Minox Pocket Telescope T8". www.submin.com. Retrieved 2021-05-12.

worldcat.org

search.worldcat.org

Apinis, Pēteris (2006). A Hundred Great Latvians. Riga: Nacionālais apgāds. p. 126. ISBN 978-9984-26-288-8. OCLC 238892134. Walter Zapp was born on 4 September 1905 in the family of a Riga merchant. His father was a British subject, but his mother was a Baltic German.