Ключевые слова: abstract, academic, antique, background, blank, blue, book, college, color, colorful, concept, cover, education, educational, empty, exercise, group, hardcover, heap, information, isolated, knowledge, learn, library, literature, note, notebook, novel, object, old, open, page, paper, path, pile, reading, retro, school, science, stack, studio, study, studying, text, textbook, texture, textured, tome, vintage, white,