%0 Journal article %A Hoffmann, F. %A Janussen, D. %A Dröse, W. %A Arp, Gernot %A Reitner, Joachim %T Histological investigations of organisms with hard skeletons %O a case study on siliceous sponges %R 10.23689/fidgeo-829 %J Biotechnic histochemistry %V 78 %N 3/4 %U http://hdl.handle.net/11858/00-1735-0000-0001-33F2-E %~ FID GEO-LEO e-docs