LITHOSTRATIGRAPHY AND PLANKTONIC FORAMINIFERAL BIOSTRATIGRAPHY OF THE APTIAN-ALBIAN "SCISTI A FUCOIDI" IN THE PIOBBICO CORE, MARCHE, ITALY: BACKGROUND FOR CYCLOSTRATIGRAPHY. RIPS [Internet]. 1989 Sep. 29 [cited 2026 Jul. 28];95(3). Available from: https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/10625