There are 3 titles associated with this firm.

@book{ wphp_25116
  author={Unknown,},
  year={1751},
  title={The rural maid, a poem.},
  publisher={},
  address={London},    }
@book{ wphp_25510
  author={Swan,John and Jeffreys,Elizabeth},
  year={1752},
  title={The only true and authentic trial of John Swan and Miss Elizabeth Jeffreys, for the murder of her uncle, Mr. Joseph Jeffreys, of Walthamstow in Essex, at the Lent assizes held at Chelmsford, on Wednesday the eleventh instant, before the Hon. Sir Martin Wright and Sir Michael Foster, Knts. Two of His Majesty's Justices of the Court of King's-Bench. To which are added, original letters, in which are included their own Confessions; and several Particulars relating to the Murder, never before made public. Also the will of the late Mr. Jeffreys.},
  publisher={},
  address={London},    }
@book{ wphp_5536
  author={Unknown,[Woman]},
  year={1755},
  title={The country coquet; or, miss in her breeches. A ballad opera. As it may be acted at the Theatre-Royal in Drury-Lane. By a young lady.},
  publisher={John Major \& George Woodfall [Charing Cross] \& },
  address={London},    }