Children's Mathematics 4-15: Learning from Errors and Misconceptions Autor Julie Ryan et al. 16 apr 2007 Paperback Preț: 248.39 lei 6-8 săpt.
Leading Issues in Cyber Warfare and Security Editat de Julie Ryan 30 sep 2015 Paperback Preț: 188.84 lei 6-8 săpt.
Leading Issues in Information Warfare Research Editat de Julie Ryan noi 2014 Paperback Preț: 119.67 lei 6-8 săpt.