STUDY OF UPPER PERMIAN AND LOWER-MIDDLE TRIASSIC CONODONTS FROM SHANG SI,GUANG YUAN-GUAN ZI BA,WANG CHANG,SICHUAN PROVINCE
Jiang Wu Yang Men-Jie
西南石油大学学报(自然科学版) . 1983, (3): 1 -16 .  DOI: 10.3863/j.issn.1000-2634.1983.03.001