Anyone involved with producing this musical still living?

Several of my husband's relatives from Oklahoma were involved in this production as American Indian extras. His grandmother, Margaret Ross, was on screen dressed as a Indian Squaw in front of the hotel just before the troop leaves the hotel property during the early part of the film. Following a recent death in the family we have come across documentation that leads us to believe that several members of my husband's family may have been involved as Indian extras in this 1950 production. Ann Ross and other relatives may have also been involved. Contact from anyone with information about the casting of the Indian extras for Annie Get Your Gun would be appreciated.