3ABELL D , HAMMOND J.Strategic market planning [M].Prentice-Hall, Englewood, clifs, N. J, 2001: 57-58.
4ABURASHED J.A theoretical-analysis of the beneficial-efects of the brain-drain Phenomenor[J ].Revue Canadienne D Etudes DuDevelopmentStudies, 2007, 12(2): 232-233.
5ADDISON J, SIEBERT W S.The marker for labour [ M ] .Califormia: Goodyear, 2003: 14-15.
6CHAI H, KNIGHT J MO R, et al.The rural labour force survey for china[M ] .The Main Results, 1996: 33-36.
