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  • The environmental adaptation of nomads in the West African Sahel: a key to understanding prehistoric pastoralists in The Sahara and the Nile. Quaternary environments and prehistoric occupation in northern Africa.
  • The study of activities in the quaternary sector in Human activity and time geography.
  • The author shows that developments in the economic conditions of the Dutch society i.e. the shift in employment from secondary to tertiary and quaternary sections of economic life, has attracted the attention of human geographers in this country. He
  • The data set can be seen like an unique quaternary table I J M T containing 11 19 17 10 numbers (i. e. 35 530 elements) or one can say that there are 110 tables (19 17) if the data are put in partial rectangular tables (J M), each giving