retrogression

来源: 老百姓之一 于 2005-10-13 09:34:44 [] [旧帖] [给我悄悄话] 阅读数 : (124 bytes)

http://www.lianglaw.com/INS/2005/101205-visaq&a.pdf
there is explain in detail about retrogression's impacts on EB1/2/3.

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