Apatites Properties Peculiarities from Different Rocks of Chemerpol Area (Middle Bug Area) Deduced By Radio Frequency Spectroscopy - E. A. Kalinichenko; A. B. Brik; A. M. Kalinichenko; V. A. Gatsenko; O. V. Frank-Kamenetskaja; N. N. Bagmut (Mineralogical journal, 2014)