''Pieni tietosanakirja'' ("The Small Encyclopedia") (1925-1928), published by Otava in four volumes, was the second Finnish-language encyclopedia. It followed the earlier, eleven-volume '' Tietosanakirja''. Being published more than 70 years ago,

Project Runeberg Project Runeberg ( sv, Projekt Runeberg) is a digital cultural archive initiative that publishes free electronic versions of books significant to the culture and history of the Nordic countries. Patterned after Project Gutenberg, it was founded ...

considers the original edition of ''Pieni tietosanakirja'' to be in the public domain,''Pieni tietosanakirja''
at

though this interpretation is contested by the letter of the relevant law. Otava also released two updated versions of the book, the first in 1952, the second in 1958–1959, both in four volumes.

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''Pieni tietosanakirja''
at

. Finnish-language encyclopedias Finnish non-fiction books 1925 non-fiction books Otava (publisher) books 20th-century encyclopedias Finnish encyclopedias {{encyclopedia-stub