TY - JOUR A1 - Kohring, Rolf A1 - Reitner, Joachim T1 - A problematic microfossil from the Oligocene of Rott (Siebengebirge, Germany), with affinities to freshwater Bryozoan Statoblasts (Phylactolaemata) Y1 - 1991 DO - 10.23689/fidgeo-784 PB - Fachbereich Geowiss. CY - FU Berlin UR - http://hdl.handle.net/11858/00-1735-0000-0001-33B0-4 ER -