Thanks to Ahmed Umer Ashraf from Pakistan, who emailed suggestions about two women in mathematics that were active in their 60s. He says he learned about Dr. Sved. from reading her papers.
Marta Sved with Keith Hamann at an Australian Mathematics Trust
function in Adelaide on Thursday 10 June 1999.
There’s a scholarship named after her at the University of Adelaide in Australia. I also found a review of her book, Journey into Geometries (1997) by Vijay Fafat on the site compiled by Alex Kasman at the College of Charleston. According to the Mathematics Geneology Project, a Marta Sved received a PhD in 1985 for a dissertation: On Finite Linear And Baer Structures.
Anyone know more?