USE OF METRIC METHODS OF RESEARCH IN THE LIBRARY OF VINNYTSIA STATE PEDAGOGICAL UNIVERSITY NAMED AFTER MYKHAILO KOTSIUBYNSKY - В. С. Білоус (Vìsnik Odesʹkogo Nacìonalʹnogo Unìversitetu: Bìblìotekoznavstvo, Bìblìografoznavstvo, Knigoznavstvo, 2017)