Ключевые слова: abstract, america, archive, background, blurred, book, bookcase, bookshelf, bookstore, cabinet, classroom, collection, concept, defocused, education, equipment, floor, foot, hardcover, houston, information, interior, knowledge, ladder, learn, library, literature, perspective, plastic, public, reading, reference, research, row, school, science, shelves, stand, step, stepstool, stool, student, study, texas, textbook, university, usa, wide, wisdom, wood,