There are 2 titles associated with this firm.

@book{ wphp_14352
  author={Stewart,Maria W.},
  year={1831},
  title={Religion and the Pure Principles of Morality, the Sure Foundation on which We Must Build; Productions from the Pen of Mrs. Maria W. Steward.},
  publisher={William Lloyd Garrison and Isaac Knapp},
  address={Boston},    }
@book{ wphp_14353
  author={Stewart,Maria W.},
  year={1832},
  title={Meditations from the pen of Mrs. Maria W. Stewart: presented to the First African Baptist Church and Society, in the city of Boston.},
  publisher={},
  address={Boston},    }