Oříznout obrázek docent knihu a objevil jeden prst - Stock fotografie a obrázky

Senior lecturer holding piece of chalk and looking away

Grey hair professor pointing on something at lecture hall

Senior lecturer pointing on something in lecture room

Senior lecturer holding book and looking away

Senior lecturer leaning on table and looking away

Happy senior lecturer buttoning shirt

Pensive senior lecturer standing with pencil isolated on white

Grey hair professor holding stack of books

Cropped shot of senior man with pencil and sheet of paper

Cropped view of senior man in stylish clothes holding eyeglasses and digital tablet isolated on dark grey

Confused senior man showing dubium gesture while looking at camera isolated on grey

Smiling senior man in shirt and jacket pulling hand at camera on blurred foreground isolated on grey

Thoughtful senior man with pencil and sheet of paper in front of white brick wall

Cropped view of stylish senior businessman holding eyeglasses isolated on black

Smiling senior man looking at camera while touching jacket isolated on grey

Positive senior man talking on smartphone and pointing with finger isolated on grey