Profesor sénior en la sala de conferencias vacía celebración de la computadora portátil y mirando a la cámara - Foto e imagen de stock

Grey hair professor sitting on desk in empty lecture room and using laptop

Grey hair professor sitting in empty lecture room and looking at laptop

Smiling grey hair professor sitting in empty lecture room

Smiling grey hair professor sitting on desk in empty lecture room and talking by smartphone

Grey hair professor sitting in empty lecture room with crossed arms

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Grey hair professor looking at laptop

Side view of adult son describing senior father how to shopping online with credit card at home

Cropped image of grey hair man using laptop on sofa at home

Close-up shot of senior writer at workplace taking book from stack

Senior writer looking at photo in frame at his workplace

Close-up shot of senior man using laptop

Handsome man using laptop while sitting at home

Handsome senior writer working with laptop and making notes in notebook

Adult son using laptop and senior father reading business newspaper at home

Senior man in tweed suit writing letter in front of white brick wall