TOARCIAN NANNOBIOHORIZONS FROM LUSITANIAN BASIN (PORTUGAL)AND THEIR CALIBRATION AGAINST AMMONITE ZONES. RIPS [Internet]. 2006 Nov. 30 [cited 2026 Jul. 28];112(3). Available from: https://test-ojs-unimi-it.archicoop.it/index.php/RIPS/article/view/6350