GOST 29003-1991 Inductor and transformer cores for telecommunications. Part 4. Blanc detal specification, magnetic oxide cores transformers and chokes for power applications assessment level A
GOST 28900-1991 Guide to the specifications of limiting values for physical imperfections of parts of ferromagnetic oxides
GOST 28997-1991 Inductor and transformer cores for telecommunication. Part 1. Generic specification
GOST 29002-1991 Inductor and transformer cores for telecommunication. Part 4. Sectional specification magnetic oxide cores for transformers and chokes for power applications
GOST 29004-1991 Cores for inductors and transformers for telecommunications. Part 1. Measuring methods
GOST 29003-1991 history
1991GOST 29003-1991 Inductor and transformer cores for telecommunications. Part 4. Blanc detal specification, magnetic oxide cores transformers and chokes for power applications assessment level A