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ralph lauren polo

First Author:
Yasuyuki Sugiyama
Faculty of Economics, Fukui Prefectural University
4-1-1 Matsuoka-Kenjojima, Eiheiji Town, Yoshida County
, 910-1195, JAPAN

Second Author:

Patcharin Koonsed
Department of International Trade Promotion, Ministry of Commerce
563 Nonthaburi Rd.
Muang, 11000, Thailand