You are about to send the following abstract:
De Bra, P., Santic, T. & Brusilovsky, P. (2003). AHA! meets Interbook, and more... In A. Rossett (Ed.), Proceedings of E-Learn 2003--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 57-64). Phoenix, Arizona, USA: Association for the Advancement of Computing in Education (AACE).