Kang-Tsung Chang Zhaoxing Li Modelling snow accumulation with a geographic information system. 693-707 2000 14 International Journal of Geographical Information Science 7 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=1365-8816&volume=14&issue=7&spage=693 db/journals/gis/gis14.html#ChangL00