If you are the adoptees and were adopted before Jan 1, 1964 you are entitled to your original birth certificates so why not get them?
I have an affidavit I can send you if you want and you can COPY it.
An original BC has lots of potential info for assisting you with your search.
Email me if you need the Affidavit.
VMCCA43559@AOL.COMBlessings
Mackie