Khác biệt giữa bản sửa đổi của “Bọ ba thùy”

n (clean up)
==Liên kết ngoài==
* {{chú thích|url=|title=A Guide to the Orders of Trilobite|first=Sam|last=Gon III}}. (A site with information covering trilobites from all angles. Includes many line drawings and photographs.)
* {{Britannica|605346|Trilobite (fossil subphylum)}}
*[ The Virtual Fossil Museum - Class Trilobita] - Including extensive photographs organized by taxonomy and locality.
*[ Western Trilobite Association]
*[ The Paleontological Society]
*{{Cite EB1911|wstitle=Trilobites}}
{{Link GA|ca}}