amazon通販
Information Systems Security: Third International Conference, ICISS 2007, Delhi, India, December 16-20, 2007, Proceedings (Lecture Notes in Computer Science)
Cryptography and Coding: 11th IMA International Conference, Cirencester, UK, December 18-20, 2007, Proceedings (Lecture Notes in Computer Science)
A-Level Mathematics for Edexcel: Core C1/C2