4Detailed Structure and Explanatory Notes ISIC Rev.4[EB/OL].http: //unstats.un.org/unsd/cr/registry/regcst.asp?Cl=27,/2008-06-20.
5GB/T4754-2002,国民经济行业分类与代码[S].
二级参考文献4
1[1]Statistical Office of the United Nations. International Standard Industrial Classification of All Economic Activities[S]. New York,1949. 1-3.http://unstats.un.org/unsd/class/family/historical/isic/papers/isic-1949.pdf 2003-04-13.
2[2]Statistical Office of the United Nations. International Standard Industrial Classification of All Economic Activities[S]. New York, 1958. 1-27.http://unstats.un.org/unsd/class/family/historical/isic/papers/isic-1958.pdf 2003-04-13.
3[3]List of international family of economic and social classifications[S]. http://unstats.un.org/unsd/cr/family1.asp 2003-04-13.
4[4]International Standard Industrial Classification of All Economic Activities[S].Chronology of updates and revisions.http://unstats.un.org/unsd/class/family/historical/isic/default.htm 2003-04-13.
