There are 3 titles associated with this person.

@book{ wphp_15203
  author={Langsdorff,Georg Heinrich von},
  year={1813},
  title={Voyages and Travels in Various Parts of the World, during the Years 1803, 1804, 1805, 1806, and 1807. By G. H. von Langsdorff, Aulic Counsellor to His Majesty the Emperor of Russia, Consul-General at the Brazils, Knight of the Order of St. Anne, and Member of Various Academies and Learned Societies. Illustrated by Engravings from Original Drawings.},
  publisher={Henry Colburn [Conduit Street] \& },
  address={London},    }
@book{ wphp_15204
  author={Langsdorff,Georg Heinrich von},
  year={1814},
  title={Voyages and Travels in Various Parts of the World, during the Years 1803, 1804, 1805, 1806, and 1807. By G. H. von Langsdorff, Aulic Counsellor to His Majesty the Emperor of Russia, Consul-General at the Brazils, Knight of the Order of St. Anne, and Member of Various Academies and Learned Societies. Illustrated by Engravings from Original Drawings. Part II. Containing the Voyage to the Aleutian Islands and North-West Coast of America. and Return by Land over the North-East Parts of Asia, through Siberia, to Petersburgh.},
  publisher={Henry Colburn [Conduit Street] \& },
  address={London},    }
@book{ wphp_15205
  author={Langsdorff,Georg Heinrich von},
  year={1817},
  title={Voyages and Travels in Various Parts of the World, during the Years 1803, 1804, 1805, 1806, and 1807. By G. H. von Langsdorff, Aulic Counsellor to His Majesty the Emperor of Russia, Consul-General at the Brazils, Knight of the Order of St. Anne, and Member of Various Academies and Learned Societies.},
  publisher={},
  address={Carlisle},    }