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senior man holding book against white background
A portrait of university professor standing in the campus library, smiling and looking at the camera with copy-space.
On the university campus, a Male professor is selecting books in the library.
A distinguished senior man, characterized by his glasses and beard, stands amidst the bookshelves of the library, embodying the pursuit of knowledge and the love of literature.
A middle-aged men works in a school library. Professor prepares classes at the department.
Mature journalist writing down notes, preparing article for scientific magazine
Professor, librarian, or adult student researching in the library.
Portrait of happy middle-aged man in library. Smiling teacher in glasses preparing for lectures and looking at camera through bookshelf with books. Education for adult people and teachers work concept
Smiling lawyer sitting at desk in office
A senior Caucasian therapist is standing in his office with a green mental health awareness ribbon attached to his jacket and with copy-space.
Focused casual mature male writing in notepad and reading books in the library
Teacher, Professor, Senior Adult, University,Library,Book,Senior,Men,60-69 Years,40-49 Years,50-59 Years,Photography
Inspired mature writer sitting in a library, completing last chapter of his new book
On the university campus, a male professor is giving an angry lecture.
fifties
A group of business people are using mobile devices in a meeting room.
Dnepropetrovsk, USSR - circa 1982: A young researcher at the Dnepropetrovsk Metallurgical Institute makes manual calculations without the use of a microcalculator and a personal computer.
A university professor is in the university library working on his research and using his mobile phone.
Smiling librarian standing with arms crossed in a library
Portrait of friendly senior man working on laptop in library, doing research
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Concentrated mature man spending time in library, reading books and making laptop. Self-education concept
Teacher, Professor, Senior Adult, University,Library,Book,Senior,Men,60-69 Years,Photography
On the university campus, a Male professor is selecting books in the library.
Professor sitting at desk using laptop in college library
Mature businessman in eye glasses and suit is thinking about work with laptop
Free Images: "bestof:Fwjo.jpg en This is a photo of Professor Frank Olver it's upload for his biographical Wikipage Peter Olver son IPST at the University of Maryland Institute"
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