George, you are making me feel bad, I am having to admit defeat.
I cannot find Carmen's oibt, and we have her death date.
I can't access newspapers for that year.
Here's what I would like for you to do. I am posting a link to the library located at the last residence she lived in.
I got that from her social security death record.
Look on the page where it says "Research and Reference questions" under that click on Maryland Askusnow"
it is an online librarian, explain to her the difficulty
you are having accessing the obituary, and give her the exact date of death and tell her that she died in Hyattsville, Md. hopefully she will be nice, and find it for you.
I can't locate Susie and Catherine's death records.
Maybe if you get Carmen's obit, it will help you know if they were still living and if so, where.
Let me know if the librarian helped you and what you find out. Click on this link for the library:
http://www.pgcmls.info/contactus