There are 3 titles associated with this firm.

@book{ wphp_19434
  author={Rowson,Susanna},
  year={1794},
  title={Mentoria; or the Young Lady's Friend. In two volumes. By Mrs. Rowson, of the New-Theatre, Philadelphia: Author of The Inquisitor, Fille de Chambre, Victoria, Charlotte, &c. &c.},
  publisher={Robert Campbell \& },
  address={Philadelphia},    }
@book{ wphp_19446
  author={Rowson,Susanna},
  year={1795},
  title={Trials of the human heart, a novel. In four volumes. By Mrs. Rowson, of the New Theatre, Philadelphia, author of Charlotte, Fille de chambre, Inquisitor, &c. &c.},
  publisher={},
  address={Philadelphia},    }
@book{ wphp_19240
  author={Roche I,Regina Maria},
  year={1801},
  title={The children of the abbey, a tale. In four volumes. By Regina Maria Roche. Second American Edition.},
  publisher={Robert Campbell \& },
  address={Philadelphia},    }