History
Ordnance QF 25-pounder - Wikipedia
https://en.wikipedia.org/wiki/25_pounder#DesignBook sources - Wikipedia
https://en.wikipedia.org/wiki/Special:BookSources/978-1-78096-017-3Louis Bonaparte - Wikipedia
https://en.wikipedia.org/wiki/Louis_BonaparteBook sources - Wikipedia
https://en.wikipedia.org/wiki/Special:BookSources/978-3-902526-13-7International Standard Book Number - Wikipedia
https://en.wikipedia.org/wiki/ISBN_(identifier)
Etymology
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https://books.google.com/books?id=9ntLB8W-cVQC&pg=PA37&dq=houfnice&sig=T7mJZVnHxFjGn7nBaaBWhWdg32o#PPA36,M1Stephen Turnbull (historian) - Wikipedia
https://en.wikipedia.org/wiki/Stephen_Turnbull_(historian)Oxford University Press - Wikipedia
https://en.wikipedia.org/wiki/Oxford_University_PressVáclav Machek (linguist) - Wikipedia
https://en.wikipedia.org/wiki/V%C3%A1clav_Machek_(linguist)