2ND INTERNATIONAL BAKU CONFERENCE ON SCIENTIFIC RESEARCH April 28-30, 2021 Baku Odlar Yurdu University, Azerbaijan ISBN: 978-605-70554-6-0 THE BOOK OF FULL TEXTS/ VOLUME-III (',7256 3URI 'U 7HUODQ $%'8//$<(9 $VVRF 3URI 'U 5DKLE ø0$0*8/8<(9