① 1975-5 4V-U VG21 ② 1977-1 4V-U C-VG30 ③ 1978-11 4V-EU E-VG series This is a set of 3 books. Overall, there is dirt, yellowing, and stains. The covers have scratches, discoloration, and wear and tear from use. Also, book ① has stamp marks on the edges of the pages, and there are traces of repair on a torn part of the back cover. Book ② also has stamp marks and writing in marker on the back cover (as shown in the sticky note in photo 11). Please consider purchasing if you understand these conditions.