There are 3 titles associated with this person.

@book{ wphp_23955
  author={Stephens,Joanna},
  year={1739},
  title={Mrs. Stephen's cure for the stone.},
  publisher={s.n. [sine nomine]},
  address={London},    }
@book{ wphp_22057
  author={Stephens,Joanna},
  year={1739},
  title={Mrs. Stephens's receipt for the stone and gravel. To which are added, three other receipts, viz. I. For the gout. II. For the bite of a mad dog. III. Dr. Mead's receipt for the same.},
  publisher={},
  address={London},    }
@book{ wphp_22052
  author={Stephens,Joanna},
  year={1740},
  title={A most excellent cure for the stone and gravel, as published by Mrs. Joanna Stephens, For which Discovery she is allowed Five Thousand Pounds by Act of Parliament. To which is added, a compleat list of the nobility, gentry, physicians, and surgeons, who are appointed by Parliament to examine the said medicines.},
  publisher={},
  address={London},    }