Graue Haare Professor dehnt sich im leeren Hörsaal - Stockfoto & -bild

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

Smiling grey hair professor sitting in empty lecture room

Grey hair professor sitting in empty lecture room with crossed arms

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

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

Senior lecturer holding book and looking away

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

Grey hair professor yawning in empty lecture room

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

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

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

Cropped shot of senior writer putting on his vintage watch at workplace

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

Serious senior man writing in notebook with pencil

Senior writer at workplace taking book from stack

Bearded senior writer reading manuscript with magnifying glass

Thoughtful senior man looking at laptop