 Between 1970 and 1978, the same group published the six-volume Encyclopedia Lituanica, an English-language encyclopedia on Lithuania and Lithuania-related topics.It remains the most comprehensive work on Lithuania in English.In Lithuania, Soviet authorities printed a three-volume Concise Soviet Lithuanian Encyclopedia ("Mažoji lietuviškoji tarybinė enciklopedija") between 1966 and 1971; that is, after the Boston Encyclopedia was already completed.