There are 2 titles associated with this person.

@book{ wphp_15722
  author={Armstrong,John and Hammond,James},
  year={1798},
  title={The Economy of Love, by Dr. John Armstrong. To which are added Love Elegies, by Mr. Hammond.},
  publisher={Ann Lemoine \& John Roe [Chiswell]},
  address={London},    }
@book{ wphp_13898
  author={Armstrong,John and Hammond,James},
  year={1801},
  title={The Economy of Love, by Dr. John Armstrong. To Which Are Added, Love Elegies, by Mr. Hammond.},
  publisher={Ann Lemoine},
  address={London},    }