Седой профессор, указывающий на что-то на доске - Стоковое фото и изображение

Grey hair professor pointing on something at blackboard

Grey hair professor pointing on something at lecture hall

Grey hair professor holding stack of books

Senior lecturer holding piece of chalk and looking away

Grey hair professor sitting on table in lecture room and holding book

Cropped image of senior lecturer holding book and showing one finger up

Senior lecturer pointing on something in lecture room

Positive senior man talking on smartphone and pointing with finger isolated on grey

Handsome grey hair man holding book and looking at camera at home

Elderly man in shirt and jacket using smartphone isolated on grey

Handsome grey hair man sitting in armchair, holding old photos and looking away

Smiling senior man holding digital tablet with blank screen isolated on grey

Cropped shot of senior man with pencil and sheet of paper

Confused senior man showing dubium gesture while looking at camera isolated on grey

Elderly man in bow tie and blue jacket using smartphone isolated on grey