http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Những câu truyện lý thú về hình học
Gồm hơn 20 câu chuyện lý thú về hình học như: bài toán Konigsberg, bài toán vẽ một nét, câu đố của mê cung, hình học trên màng cao su...