Yttrium, lanthanum, ytterbium, lutetium and their oxides. Chemical-spectral method of determination of impurities of vanadium, tungsten, iron, cobalt, manganese, copper, molybdenum, nickel, niobium, lead, tantalum, titanium and chromium
Leather. Methods of determination of certain azo colorants in dyed leathers. Part 1. Determination of certain aromatic amines derived from azo colorants
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