Turbellarians source details
Ax, P. (1960). Die entdeckung neuer organisationstypen im tierreich. [The discovery of new types of organization in the animal kingdom.]. Die Neue Brehm, Bucherei, a. Ziemsen Verlag, Wittenbberg Lutherstadt, 116 pp. Chapter Arthropoda:60-77.
193462
Ax, P.
1960
Die entdeckung neuer organisationstypen im tierreich. [The discovery of new types of organization in the animal kingdom.]
Die Neue Brehm, Bucherei, a. Ziemsen Verlag, Wittenbberg Lutherstadt, 116 pp.
Chapter Arthropoda:60-77
Publication
Available in Wilson Copepod Library (non-digital)
Available for editors 
Date
action
by
Ruanis Marcus, 1952 (status source)