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Dissertatio de loquela, qua non solum vox humana, & loquendi artificium ex originibus suis eruuntur: sed & traduntur media, quibus ii, qui ab incunabulis surdi & mudi fucrunt, loquelam adipisci, quique difficulter loquuntur, vitia sua emendare possint / Auctore Io. Conrado Amman. Public Domain Mark. Source: Wellcome Collection.