Revised edition, Showa 49 (1974), Gakken Learning Encyclopedia, 4 volumes only. There's something special about books. They allow you to see a lot of knowledge all at once, making them perfect for sparking interest in specific topics. Individual sales are possible, but the price won't change much as it's mostly the shipping cost. There is considerable soiling and deterioration, but there's no problem with reading the content. The following was generated by AI: A set of encyclopedias covering a diverse range of knowledge about science and nature. - Title: Gakken Learning Science Encyclopedia, Volumes 2, 4, 6, and 8 - Edition: Revised Edition - Contents: Geography of Japan, Geography of the World, History, Animals & Plants, Matter and Energy - Condition: Age-related deterioration - Number of volumes: Partial set of 4 volumes Thank you for looking.