1997. PALEOMAGNETIC AND PALYNOLOGIC INVESTIGATIONS IN THE UPPER VALDARNO BASIN (CENTRAL ITALY): CALIBRATION OF AN EARLY VILLAFRANCHIAN FAUNA. Rivista italiana di Paleontologia e Stratigrafia. 103, 1 (mar. 1997). DOI:https://doi.org/10.13130/2039-4942/5285.