Printing types. Type family Journaljnaya roublenaya (for alphabets of Russian and roman graphic bases). Range of application. Type face design. Base line. Characters per 4 picas
Yttrium and its oxides. Method of determination of such impurities as oxides of praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium and ytterbium