Martha Roberts first appeared in Feature Comics #27 (December 1939) in the Doll Man feature (also see: https://community.cbr.com/showthread...ciation-thread and https://community.cbr.com/showthread...eciation-(2019), but it was in Doll Man #37 (December 1951) that she took on a new role: Doll Girl!
Her Golden Age run as Doll Girl lasted until Doll Man #47 (October 1953).
And from Who's Who Update '87 Vol. 2 (September 1987):