Senior docent schrijven iets op blackboard en het tonen van één vinger omhoog - Stockfoto’s en -afbeeldingen

Senior lecturer holding book and pointing on something

Senior lecturer showing idea gesture

Smiling grey hair professor holding paper plane in lecture hall

Grey hair professor showing fist to students

Senior lecturer holding book and looking away

Cheerful businessman in glasses voting near brick wall

Smiling elderly man looking at camera while holding laptop isolated on grey

Adult son and senior father gesturing while playing chess at home

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

Serious senior man writing in notebook with pencil

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

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

Senior man with sheet of kraft paper looking away at workplace

Handsome grey hair man sitting at table with chessboard and looking at camera