GOST 26033-1983 Metering amplifiers of direct current and its voltage. General specifications
GOST 4.375-1985 history
1993GOST 13384-1993 Measuring transducers for thermoelectric transducers and resistance thermotransducers. General technical requirements and methods of tests
1985GOST 4.375-1985 Product-quality index system. Measuring analogue transducers, amplifiers, stabilizers and transformers. Index nomenclature