CARBONIFEROUS PLANT FOSSILS FROM THE SAN LORENZO SCHISTS (PISANI MOUNTAINS, TUSCANY, ITALY): A PRELIMINARY STUDY OF THE PALAEOBOTANICAL COLLECTION OF THE MUSEO NATURALISTICO ARCHEOLOGICO DELL’APPENNINO PISTOIESE. Rivista italiana di Paleontologia e Stratigrafia, v. 127, n. 2, 25 giu.2021.