1993GOST 13637.3-1993 Gallium. Chemical-atomic-emission method for the determination of aluminium, bismuth, cobalt, silicon, magnesium, manganese, copper, nickel, lead, silver, chromium, zinc and iron
1977GOST 13637.3-1977 Gallium. Chemical-spectral method for the determination of aluminium, bismuth, cobalt, silicon, magnesium, manganese, copper, nickel, lead, silver, chromium, zinc