There are 6 titles associated with this firm.

@book{ wphp_17274
  author={Edgeworth,Maria},
  year={1810},
  title={Letters for Literary Ladies. To Which is Added, An Essay on the Noble Science of Self-Justification. By Miss Edgeworth},
  publisher={Joseph Milligan},
  address={Georgetown},    }
@book{ wphp_18939
  author={Opie,Amelia},
  year={1810},
  title={Simple tales: by Mrs. Opie. Second American Edition.},
  publisher={Joseph Milligan},
  address={Georgetown},    }
@book{ wphp_17283
  author={Edgeworth,Maria},
  year={1810},
  title={The Modern Griselda. A Tale. By Miss Edgeworth, Author of The Parent's Assistant, Tales of Fashionable Life, Letters for Literary Ladies, Moral Tales, &c. First American Edition.},
  publisher={Joseph Milligan},
  address={Georgetown},    }
@book{ wphp_18227
  author={Lamb,Mary and Lamb,Charles},
  year={1811},
  title={Mrs. Leicester's school: or, The history of several young ladies, related by themselves. First American Edition.},
  publisher={Joseph Milligan \& },
  address={Georgetown},    }
@book{ wphp_18917
  author={Opie,Amelia},
  year={1812},
  title={The father and daughter: a tale. By Amelia Opie.},
  publisher={William Cooper \& Joseph Milligan \& },
  address={Georgetown},    }
@book{ wphp_18917
  author={Opie,Amelia},
  year={1812},
  title={The father and daughter: a tale. By Amelia Opie.},
  publisher={William Cooper \& Joseph Milligan \& },
  address={Georgetown},    }