http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Các phân vị địa tầng đệ tứ Việt Nam
Thư mục: tr. 185-187; Trình bày những khái niệm chung về đệ tứ và các phân vị địa tầng đệ tứ ở Việt Nam
Nguyễn Địch Dỹ chủ biên...[và những người khác]