Diane Arbus. This is very interesting to me because there isn't the feeling of a stereotypical "abused circus slave" in this photo. The women looks genuinely happy to have her job rather than being forced to do it.
Diane Arbus was a wonderful photographer known for her informal portraits - mostly of misfits, from the onwards. These are the highest resolution Arbus scans that I could find online but I can't trace the original scanners. :(