Profesor senior apoyado en la mesa y mirando hacia otro lado - Foto e imagen de stock

Senior lecturer holding piece of chalk and looking away

Senior lecturer pointing on something in lecture room

Grey hair professor pointing on something at lecture hall

Senior lecturer holding book and looking away

Happy senior lecturer buttoning shirt

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

Grey hair professor pointing on something at blackboard

Smiling grey hair professor holding stack of books with apple on top

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

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

Pensive handsome grey hair man holding book and looking at camera

Smiling senior man holding medical mask isolated on grey

Happy bearded speaker in glasses talking near microphones and brick wall

Serious senior man in tweed suit and glasses looking at camera

Excited senior man in bow tie and jacket holding smartphone isolated on grey

Smiling elderly man in eyeglasses and bow tie looking at camera isolated on grey