Příruční slovník naučný

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Příruční slovník naučný (PSN, freely translated into English as Small dictionary of facts) was a four volumes encyclopedia in Czech language published in Czechoslovakia between 1962 – 1966.

The encyclopedia was published by the Czechoslovak Academy of Sciences. The aim was to displace the older Otto's encyclopedia by a new work, fitting political views of the Communist Party of Czechoslovakia. Apart from traditional items it contains a large amount of (very flattering) information about worldwide communist movement, its leaders and about countries of the Eastern Bloc.

The main editor was academician Vladimír Procházka. The volumes have around 800 – 900 pages of dense print each.

The encyclopedia was mandatorily bought by all organisations in the Czech part of Czechoslovakia; tens of thousands were printed.