Some of these women were way back Goofy! Try the New York Times database if you near a college-as many of these women were in the northeast US.
Angela Buxton-lives in the Miami Florida area. You can read a lot about in the book "The Match:Althea Gibson and Angela Buxton", by Bruce Schoenfeld.
If you "google" Burgin you should find out what she's doing now.
Carrie Heldman is probably Julie's sister, so I'd try to contact Julie Heldman.
I never heard of Carolyn Hirsch-but I assume she is the sister of Millicent (Hirsch) Lang, a pretty good player of the 1930s and 1940s.
Best of luck and do share anything interesting that you find.