"Historically various people (Lithuanians, Latvians, Livonians, Estonians, Finns, northwest Russians) have played related box-zither type instruments (the so called Baltic psaltery) in the south east vicinity ...
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of the Baltic Sea for centuries. In the United States prominent plucked box zithers include the hammered dulcimer and the autoharp," - (en.wikipedia.org 07.10.2019)
