Multi-volume work

Schmidt-Rhaesa, A. Handbook of Zoology / Handbuch der Zoologie: A Natural History of the Phyla of the Animal Kingdom / Eine Naturgeschichte der Stämme des Tierreiches. De Gruyter. [Founded by Kükenthal, Willy] ≡

Sections

1. Schmidt-Rhaesa, A. (ed.). Gastrotricha, Cycloneuralia and Gnathifera.
2. Zachos, F.E. (ed.). Mammalia.