METHOD OF OBTAINING B 12 VITAMIN BY ION EXCHANGE von POLUPARNEVA G.P.,SU, GOLUBEVA T.A.,SU, MALINOVSKAYA G.N.,SU, SAMSONOV G.V.,SU, GRISHKUN Z.V.,SU, KUZNETSOVA S.A.,SU, ELKIN G.E.,SU, KLIKH S.F.,SU

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METHOD OF PREPARING CHLOROPRENE LATEXES von KUDRAJTIS S.A.,SU, TER-GRIGORYAN O.V.,SU, MELIKYAN D.V.,SU, MARGARYAN A.S.,SU, MNDZHOYAN SH.L.,SU, MKRYAN G.M.,SU, ELISEEVA V.I.,SU, KENKULYAN A.A.,SU, METELNIK A.I.,SU, SHAKHBAZYAN R.T.,SU, LARKINA T.A.,SU, GOLUBEVA S.K.,SU, KARAPETYAN N.G.,SU, SARKISYAN R.R.,SU, KARAPETYAN L.A.,SU, ZHAMAGORTSYAN R.K.,SU, BOSHNYAKOV I.S.,SU, ZURABYAN K.M.,SU, GRIGORYAN K.A.,SU, SARKISYAN K.G.,SU

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