Wikimedi'Òc

1721 PhD Ceremony at Leiden University.jpg - Vysotsky

LeidenDissertation.jpg - Vysotsky

1721 PhD Ceremony at Leiden University (cropped).jpg - Hansmuller

Lodewijk Meyer - De materia, ejusque affectionibus motu, et quiete - University dissertation in Latin - Leiden, 1660.pdf - Hansmuller

Schermers PhD title page.png - JorisEnter