Central theme of the book is the effect of Migration on demographic aspect. Especially on fertility and mortality, growth pattern, anthropometric variables, and haematology among the Oraons – migrant tea garden labourers of West Bengal and sedente agriculturist of Jharkhand (the then Bihar). Attempts have also been made the effects are due to the factors associated with new habitats, migrant groups, - the Proto Australoid Oraon and Mongoloid Tamang tea ...
