[68] Van Veen, De Wetenschap en[de] Manieren om alderhande Couleuren; see also https://resources.huygens.knaw.nl/bwn1780-1830/DVN/lemmata/data/Veen, https://www.dbnl.org/tekst/_zev001200201_01/_zev001200201_01_0013.php last accessed 15 June 2020.