%A ?. ?. ??????? %A ?. ?. ?????????????? %A ?. ?. ????????? %J ?????? ????????????? ?????????? ???????????? ????? ????? ??????. ??????????? ????? %T The use of QR-codes in professional training of students of environmental and educational industries %N 107 %P 70-77 %D 2021 %I ???-?? ??? ??. ?.?????? %L zu234179