Usmívající se šedými vlasy profesor držící papírové letadlo v přednáškovém sále - Stock fotografie a obrázky

Senior lecturer holding book and pointing on something

Senior lecturer holding book and looking away

Senior lecturer holding book and showing one finger up

Senior lecturer showing idea gesture

Thoughtful senior lecturer sitting at table with pencil and notebook

Senior lecturer holding book and looking away

Grey hair professor talking by smartphone and looking away

Cheerful businessman in glasses voting near brick wall

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

Serious senior man writing in notebook with pencil

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

Handsome grey hair man reading book at home

Thoughtful senior writer holding stack of books

Senior writer in tweed suit and eyeglasses with letter near workplace

Adult son and senior father gesturing while playing chess at home

Senior man with sheet of kraft paper looking away at workplace

Focused senior writer reading manuscript with magnifying glass