Ключевые слова: background, binder, binding, blank, blue, book, business, collection, colorful, colors, cover, document, education, green, group, handbook, hardcover, heap, holiday, homework, information, isolated, learning, library, literature, notebook, object, office, orange, page, paper, pile, pink, reading, red, research, school, spiral, stack, study, summer, swimming pool, text, textbook, traditional, university, vertical, vibrant, white, wisdom,