NBN T 04-127-1983 Butan-2-ol, ketones, diacetone alcohol and hexylene glycol for indus-trial use - Determination of acidity to phenolphthalein-Volumetric method
1982NBN T 04-127-1983 Butan-2-ol, ketones, diacetone alcohol and hexylene glycol for indus-trial use - Determination of acidity to phenolphthalein-Volumetric method