GOST 25336-1982 Laboratory glassware and equipment. Basic parameters and dimensions*, 1982-04-20 Update
GOST 25794.1-1983 Reagents. Methods of preparation of standard volumetric solutions for acid-base titration*, 1983-04-20 Update
GOST 25794.3-1983 Reagents. Methods of preparation of standard volumetric solutions for precipitation titration, non-aqueous titration and other titrimetric methods*, 1983-04-20 Update