@inproceedings{4a8bf2777a1147e8a83183b58a927860,
title = "G-Portal: Supporting argumentation and mutlimodality in student solutions to geographical problems",
author = "John Hedberg and Chang, {Chew Hung}",
year = "2005",
language = "English",
isbn = "1880094568",
pages = "4242--4247",
editor = "Piet Kommers and Griff Richards",
booktitle = "Educational Multimedia, Hypermedia and Telecommunications, World Conference",
publisher = "Association for the Advancement of Computing in Education",
address = "United States",
note = "World Conference on Educational Multimedia, Hypermedia and Telecommunications (2005) ; Conference date: 27-06-2005 Through 02-07-2005",
}