DescriptionJPMLdeVries.jpg English: J.P.M.L. (Jan) de Vries (1890-1964). Professor of linguistics at Leiden University (The Netherlands). Photo taken on
DescriptionJPMLdeVries (cropped).jpg English: J.P.M.L. (Jan) de Vries (1890-1964). Professor of linguistics at Leiden University (The Netherlands). Photo