[2] K. Behrens, J. F. Thisse, “ Agglomeration versus product variety: Implications for regional inequalities,” Journal of Regional Science, 2006, 46 (1) : 867-880.
[2] Adelaide Heyde, The relationship between self-esteem and the oral production of a second language ( Ph. D. disc. , University of Michigan, 1979) , pp. 32-37.
[2 ] R. S. Schfield, “ The impact of scarcity and plenty on population change in England,” in R. I. Rotberg and T. K. Rabb ( eds. ) , Huger and History: The Impact of Changing Food Production and Society ( Cambridge University Press, 1983) , p. 79.
[2]R.S.Schfield,“The impact of scarcity and plenty on population change in England,”i nR.I.Rotberg and T.K.Rabb(eds.),Huger and History:The Impact of ChangingFoodProductionandSociety(CambridgeUniversityPress,1983),p.79.
译著
[1]迪特·海因英希:《中苏走向同盟的艰难历程》,张文武等译,新华出版社,2001,第76页
[2]M.Polo,The Travels of Marco Polo,trans.by William Marsden(Hertfordshire: Cumberland House,1997),pp.55,58.