Sbl,
Here is some info for you...
Relatives
A Permanent Resident can petition for some relatives to join him or her in the United States as immigrants. Those relatives are your spouse and children, regardless of age. See our page on "Immigration through a Family Member".
If you had a spouse and children when you became a Permanent Resident, they may be eligible for permanent residence through you without filing separate petitions. This depends on how you qualified for your permanent residence. You should ask an immigration officer, attorney, or voluntary help organization for advice about this.
Here is one helpful link..
http://www.uscis.gov/graphics/howdoi/PermRes.htm#rights
PC :)