Die Crioceratiten (Ancyloceratina, Ammonoiden) des mediterranen und borealen Hauterive-Barreme (Unterkreide) = The crioceratites (Ancyloceratina, Ammonoidea of Tethyan and Boreal Hauterivian-Barremian Lower Cretaceous - Immel, Harald (Schweizerbart, 1978)