Grijze haren professor uitkijkt uit boek - Stockfoto’s en -afbeeldingen

Grey hair professor covering face with book

Senior teacher in classroom at university or college. Male old tutor on board with notebook. Lesson seminar skills. Mature man study in high school

Excited senior teacher lecturer greeting students at workshop. Amazed surprised face of funny professor. Adult learning

Excited senior teacher lecturer greeting students at workshop. Amazed surprised face of funny professor. Adult learning

Confident senior professor smoking a pipe and reading an old book, knowledge and education concept

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

Handsome grey hair man reading book at home

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

Handsome grey hair man sitting on sofa and holding book

Smiling nerd in eyeglasses holding open book isolated on white

Excited nerd having idea while holding open book isolated on white

Senior writer in tweed suit and eyeglasses with letter near workplace

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