Over de raakpunten tussen Drebbel en Philippus Lansbergen, astronoom en wiskundige.
https://drebbel.net/2002%20The%20Calvinist%20Copernicnas%20Lansbergen%20R_Vermij.pdf ----   [[Category:Perpetuum]] [[Category:PDF]][[Year::2002| ]][[Language::English| ]][[Published in::Amsterdam| ]]