Suatu penelitian mikropaleontologi terhadap contoh-contoh permukaan yang diambil dari Formasi Kalibeng, daerah Sumberlawang, Sragen, Jawa Tengah menunjukkan bahwa zonasi Berggren (1973) tidak sepenuhnya dapat dipakai di daerah tersebut.
LPMGB aims the dissemination of information on research activities, technology engineering development and laboratory testing in the oil and gas field. Manuscripts in English are accepted from all in any institutions, college and industry oil and gas throughout the country and ...