Titles by John Duncombe and Co. in BIBTEX format

There are 2 titles associated with this firm.

@book{ wphp_221
  author={Mitford,Mary Russell},
  year={1834},
  title={Charles the First. An Historical Tragedy, in Five Acts. By Mary Russell Mitford.},
  publisher={John Duncombe and Co. \& },
  address={London},    }

@book{ wphp_221
  author={Mitford,Mary Russell},
  year={1834},
  title={Charles the First. An Historical Tragedy, in Five Acts. By Mary Russell Mitford.},
  publisher={John Duncombe and Co. \& },
  address={London},    }