Lächelnder grauhaariger Professor sitzt im leeren Hörsaal - Stockfoto & -bild

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

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

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

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

Senior lecturer in empty lecture room screaming with hands up

Grey hair professor stretching in empty lecture room

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

Grey hair professor holding eyeglasses and looking at camera

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

Cropped view of senior man standing and reading book at home

Senior writer looking at photo in frame at his workplace

Handsome grey hair man reading book at home

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

Side view of handsome grey hair man using laptop at home

Handsome senior writer in tweed suit working with typewriter

Cropped shot of senior bearded writer with glass of whiskey at workplace