IntestazioneHeuraet, Hendrik ¬van¬ Usata in: Integrated Authority File (GND), Germany
VarianteHeuraet, Henricus ¬van¬
Epistola by Hendrik van Heuraet (1634-1660?) included in the Geometria by Frans van Schooten edited first time in 1659. [Hendrik van Heuraet / gallica.bnf.fr -- Public domain -- http://commons.wikimedia.org/wiki/File:Van Heuraet.png]