Grijze haren professor gebruiken van laptop aan tafel in de collegezaal - Stockfoto’s en -afbeeldingen

Thoughtful senior lecturer sitting at table with pencil and notebook

Grey hair professor looking at book

Senior lecturer holding book and looking away

Smiling grey hair professor holding paper plane in lecture hall

Senior lecturer holding book and pointing on something

Senior lecturer showing idea gesture

Senior teacher make notes. teacher of geography. classroom with map and blackboard. back to school. education in retro school. bearded man give marks in diary. write notes in book.

Handsome grey hair man reading book at home

Serious senior man writing in notebook with pencil

Pensive handsome grey hair man thinking and looking at chessboard at home

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

Handsome grey hair man sitting at table and looking at photos at home

Cheerful businessman in glasses voting near brick wall

Pensive handsome grey hair man holding book and looking at camera

Serious grey haired writer working with typewriter