For citations:

Tukhvatullin A.R., Shchelchkov A.V., Fafurin V.A. State primary special standard of units of mass and volume of liquid in a stream, mass and volumetric fowrates of liquid GET 63-2019. Izmeritel`naya Tekhnika. 2021;(2):3-8. (In Russ.) https://doi.org/10.32446/0368-1025it.2021-2-3-8