Dependence of the phase composition effect of some ferruginous quartzites of Kryvorizhzhya on the particle size of their magnetic and non-magnetic fractions by mossbauer spectroscopy data - O. M. Ponomarenko; V. P. Ivanytskyi; O. B. Bryk; N. O. Dudchenko; E. V. Polshyn (Geochemistry of technogenesis, 2014)