There are 3 titles associated with this firm.

@book{ wphp_4445
  author={Robertson,Hannah},
  year={1791},
  title={The life of Mrs. Robertson, (a tale of truth as well as of sorrow) who, though a grand-daughter of Charles II. has been reduced, by a Variety of Very Uncommon Events, From splendid Affluence to the greatest poverty. And, After Having Buried Nine Children, is Obliged, At the age of Sixty-Seven, To earn a scanty Maintenance for herself and two Orphan Grand-Children, By teaching Embroidery, Filligree, and the Art of making Artificial Flowers.},
  publisher={},
  address={Derby},    }
@book{ wphp_10521
  author={Darwin,Erasmus},
  year={1797},
  title={A plan for the conduct of female education, in boarding schools. By Erasmus Darwin, M.D. F.R.S. Author of Zoonomia, and the Botanic Garden.},
  publisher={Joseph Johnson \& },
  address={Derby},    }
@book{ wphp_8572
  author={Oakes,Susanna},
  year={1802},
  title={The Rules of the Forest. In Three Volumes. By Susanna Oakes.},
  publisher={},
  address={Derby},    }