Mszczonów County was a county of the Sochaczew Land, Rawa Voivodeship located within the Greater Poland Province of the Crown of the Kingdom of Poland, Polish–Lithuanian Commonwealth. Its capital was Mszczonów.Lucjan Tatomir. Geografia ogólna i statystyka ziem dawnej Polski. Kraków. Drukarnia "Czasu" W. Kirchmayera. 1868. p. 153.
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