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  • , the Permo-Triassic boundary and the various boundaries within the Triassic, and the derivation of kannemeyerids from dicynodontids by the late Permian or early Triassic and their middle Triassic age.
  • This paper deals chiefly with the Permo-Triassic continental succession in China, with six vertebrate horizons or faunas and their relationship with corresponding faunas in the other parts of the world, discussion on the ages of the various faunas
  • 1981
  • Migration, age, and education: a cross-sectional analysis of geographic labor mobility in Japan
  • 1981
  • Ages radiométriques C déterminés sur des mollusques et des barnacles provenant de plages fossiles de neuf sites de la côte de Makran en Iran entre Jask et la frontière pakistanaise. Deux groupes d'âges sont déterminés: 4870-6600 B. P. et 27-34000 B
  • 1981
  • In the eastern part of Hokkaido, North Japan, various periglacial phenomena such as involutions, frost cracks and ice-wedge casts have been observed in the tephra layers deposited during the last glacial age. Their distribution is mapped
  • 1981