Annelid - Wikipedia
Ringelwürmer – Wikipedia
Annelida - Kompaktlexikon der Biologie - Spektrum.de
Annelid | Definition, Characteristics, Habitat, Reproduction, Diet ...
Annelida - Lexikon der Geowissenschaften - Spektrum.de
Annelida (Ringelwürmer) | SpringerLink
ADW: Annelida: INFORMATION
Phylogenomic analyses unravel annelid evolution | Nature
Annelida | SpringerLink
Structure and classes of annelid | Britannica