"System Design Principles for Practical Use: Object-Oriented Practical Techniques for Easy and Safe Changes" Toru Masuda Gijutsu Hyohronsha ☆Instant purchase welcome☆ ・No pets or smokers in the house. ・Anonymous delivery, shipped within 24 hours with water-resistant packaging. ・Please refrain from purchasing if you are sensitive to used items. #BooksLP to see other books for sale.