AN OUTLINE OF SPORO-POLLEN ASSEMBLAGES IN CRUDE OIL IN THE SECOND MEMBER OF SHAHEJIE FORMATION AND OF THE OIL AND GAS MIGRATION,SHENGLI OIL FIELD
Wang Kaifa, Zhang Yulan, Yin Mo
Oil & Gas Geology . 1981, (4): 369 -372 .  DOI: 10.11743/ogg19810409