Lächelnder grauhaariger Professor sitzt im leeren Hörsaal am Schreibtisch und spricht per Smartphone - Stockfoto & -bild

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

Grey hair professor talking by smartphone and looking at laptop

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

Senior lecturer in empty lecture room holding laptop and looking at camera

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

Smiling grey hair professor sitting in empty lecture room

Grey hair professor working with laptop

Senior lecturer in empty lecture room screaming with hands up

Smiling handsome grey hair man talking by smartphone at table with laptop

Smiling handsome grey hair man talking by smartphone and holding laptop at home

Senior writer looking at photo in frame at his workplace

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

Handsome senior writer drinking coffee at workplace

Handsome senior writer working with laptop and making notes in notebook

Smiling adult son and senior father using laptop at home

Handsome senior writer reading manuscript with magnifying glass