Ключевые слова: book, books, copyright, day, development, ecology, educated, education, educational, encyclopedia, environment, globe, growth, history, intellectual, knowledge, law, learning, librarian, library, life, literacy, literature, medicine, month, national, past, peace, philosophy, plant, poetry, property, reading, research, rights, school, science, stem, student, sustainability, sustainable development, teacher, teaching, text, textbook, wisdom, world, writing,