Did you try a Google search for "women's labor history"? I bet you might find some helpful links that will point you to potential topics through that search. :)

You could also try looking up research on the experiences of enslaved women in the antebellum South.

One avenue to look into is the Harvey Girls. There were more than 100 Harvey House restaurants located along the Santa Fe railroad and they employed more than 100,000 women as waitresses between the 1880s and the 1950s. Fred Harvey had a strict code of conduct for his Harvey Girls, which was known as the "Harvey Way". Women as young as fourteen could work at these restaurants, but only as long as they were single. Once a Harvey girl got married, she lost her job. Although that was common in almost every other business, during that time period.
There are two books that provide more details about Harvey Girls. "Harvey Girls: women who opened the west" by Lesley Polling-Kempes and "Harvey Girl" by Shella Wood Fourd. The Lesley Polling-Kempes book is a better history of the Harvey House chain of restaurants, but the Shella Wood Fourd book goes into much greater detail about the lives of three specific Harvey Girls.
There was also a 1946 Hollywood musical, starring Judy Garland, about the Harvey Girls.