Muž na šokován tváře mezi hromadami knih, při studiu v knihovně, regály na pozadí. Termín koncepce. Učitel nebo student s vousy sedí u stolu s brýlemi, rozostření. - Stock fotografie a obrázky

Man on happy face between piles of books in library, bookshelves on background. Teacher or student with beard wears eyeglasses, sits at table with books, defocused. Scientific research concept.

Man, scientist looks at hourglass. Man on serious and shocked face watching time is going over, bookshelves on background. Time flow concept. Teacher or student with beard studying in library.

Man on shocked face between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sits at table with glasses, defocused. Deadline concept.

Deadline concept. Teacher or student with beard sits at table making roof out of book, defocused. Man on shocked face between piles of books, while studying in library, bookshelves on background.

Man on surprised face between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sits at table with books, defocused. Bibliophile concept.

Deadline concept. Man on shocked face between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sits at table making roof out of book, defocused.

Man, scientist peeking out of books. Teacher or student with beard studying in library. Man on serious and strict face watching time is going over, bookshelves on background. Time flow concept.

Man, scientist looks at hourglass. Teacher or student with beard studying in library. Man on serious and shocked face watching time is going over, bookshelves on background. Time flow concept.

Man on thoughtful face holds hourglass while studying, bookshelves on background. Teacher or student with beard studying in library. Man, scientist in glasses looks at hourglass. Time flow concept.

Man on surprised face between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sits at table with books, defocused. Bibliophile concept.

Man on busy thoughtful face reading book, bookshelves on background. Teacher or student with beard studying in library between piles of books. Education and science concept.

Man on thoughtful face holds hourglass while studying, bookshelves on background. Man, scientist in glasses looks at hourglass. Time flow concept. Teacher or student with beard studying in library.

Man on strict face sit between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sit at table with glasses, defocused. Bookworm concept.

Scientific discovery concept. Man on shocked face between piles of books in library, bookshelves on background. Teacher or student with beard wears eyeglasses, sits at table with books, defocused.

Librarian concept. Man on happy face between piles of books, while studying in library, bookshelves on background. Teacher or student with beard sits at table with books, defocused.

Time flow concept. Teacher or student with beard studying in library. Man, scientist in glasses looks at hourglass. Man on serious face watching time is going over, bookshelves on background.

Librarian concept. Teacher, scientist with beard stands at table with books, defocused. Man on thoughtful face stands between piles of books, while studying in library, bookshelves on background.

Man, scientist looks at hourglass. Time flow concept. Teacher or student with beard studying in library. Man on serious and shocked face watching time is going over, bookshelves on background.