Lefevre praef 35 p.1...
http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/4050 <http://www.w3.org/nl/lemon/frac#Attestation>
Lefevre praef 35 p.1...
Lefevre praef 35 p.111 arithmeticam numerum theoricum considerare neque circa mercatoriam ... supputationem versari.