Ключевые слова: abstract, aged, back, background, book, books, bookstore, campus, college, culture, data, dictionary, education, educational, electronic, examinations, gray, group, growth, hand, hardcover, heap, heavy, heritage, information, knowledge, law, learn, leisure, library, literacy, literature, many, nobody, old, page, paper, pile, publisher, read, school, science, stack, study, text, textbook, texture, university, vintage, wisdom,