WILHELM SCHICK, HERBERT. “BIO- AND LITHOSTRATIGRAPHIC STUDY ON THE LOWER KIMMERIDGIAN OF THE SWABIAN AND FRANCONIAN ALB (GERMANY)”. RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA 110, no. 1 (March 31, 2004). Accessed January 18, 2025. https://riviste.unimi.it/index.php/RIPS/article/view/6299.