A link might be useful

来源: WriteItOut 于 2008-03-25 17:27:00 [] [旧帖] [给我悄悄话] 阅读数 : (175 bytes)

Found a resource on the USCIS web. Don't know if it is out of date. Hopefully it helps a bit.

http://www.uscis.gov/files/nativedocuments/NSC_Filing_Tip_3_08_04.pdf

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