📁 参考
Reference is a category for sites devoted to the study of and access to information itself - teaching it (Education), using it (Knowledge Management), storing it (Libraries, Museums) - or sites containing information on topics varied and comprehensive enough that they could not be classified under the other top level Open Directory categories (Dictionaries, Directories, Encyclopedias).
子分类
条目 (15+)
Great Lakes Geometry Conference
http://www.fields.utoronto.ca/programs/scientific/04-05/GLGC/
Graphics for Inclusion in Electronic Documents
http://silas.psfc.mit.edu/elec_fig/elec_figures.html