R124 1997 Refractometers for the measurement of the sugar content of grape mustshttps://www.oiml.org/en/publications/other-language-translations/persian/r124-1997-refractometers-for-the-measurement-of.pdf/viewhttps://www.oiml.org/logo.png
R124 1997 Refractometers for the measurement of the sugar content of grape musts