Ключевые слова: abstract, aged, antique, backdrop, background, bible, blank, book, bookstore, brown, business, college, copy, cover, document, education, empty, group, hardcover, heap, information, isolated, knowledge, learn, library, literature, object, old, open, page, paper, pile, read, school, science, single, space, study, table, text, textbook, texture, university, vintage, wall, white, wisdom, wood, wooden, yellow,