GOST 8.027-1989 State system for ensuring the uniformity of measuremente. State primary standard and state verification schedule for measuring instruments of electromotive force and direct current
2001GOST 8.027-2001 State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of direct electrical vortage and electromotive force
1989GOST 8.027-1989 State system for ensuring the uniformity of measuremente. State primary standard and state verification schedule for measuring instruments of electromotive force and direct current