http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Sách trình bày lý thuyết đại cương về hoá học, những đơn chất và hợp chất của các nguyên tố điển hình theo thứ tự các nhóm nguyên tố S đến các nhóm nguyên tố P.