There are new laws around the country in various states that help adoptees and sibling adoptees find each other, birth certificates, etc. Check the thread started by Tamara Vargas on page 3 of the people forum. There is a link there that explains how many states have adopted far less restrictive rules on how adoptees and their siblings, etc. can get the records (they seemingly
should have a right to get )
Call the vital records office in the county or state where you think Paula and Melissa were adopted. Tell them you want to know
how the new laws can help you get records.
Good luck to Paula and Melissa soon.