|
Bergström, J., 1973.
Organization, life, and systematics of trilobites. Fossils and Strata, No. 2, 27 Apr 1973: [1]-69, pls. 1-5. ≡ |
|
Nielsen, A.T., 1995.
Trilobite systematics, biostratigraphy and palaeoecology of the Lower Ordovician Komstad Limestone and Huk Formations, southern Scandinavia. Fossils and Strata 38, 20 Sep 1995: [1]-374. ≡ |