There are 3 titles associated with this person.

@book{ wphp_24418
  author={Opie,Amelia and Thomson,George},
  year={1817},
  title={A Select Collection of Original Welsh Airs Adapted for the Voice, United to Characteristic English Poetry. With Introductory & Concluding Symphonies and Accompaniments for the Piano Forte or Harp, Violin & Violoncello Composed Chiefly by Joseph Haydn. Music by George Thomson, 3 vols.},
  publisher={},
  address={London},    }
@book{ wphp_24418
  author={Opie,Amelia and Thomson,George},
  year={1817},
  title={A Select Collection of Original Welsh Airs Adapted for the Voice, United to Characteristic English Poetry. With Introductory & Concluding Symphonies and Accompaniments for the Piano Forte or Harp, Violin & Violoncello Composed Chiefly by Joseph Haydn. Music by George Thomson, 3 vols.},
  publisher={},
  address={London},    }
@book{ wphp_525
  author={Thomson,George and Baillie,Joanna},
  year={1822-1824},
  title={Thomson's Collection of the Songs of Burns, Sir Walter Scott, Bart. and other Eminent Lyric Poets, ancient & modern, united to the select melodies of Scotland and of Ireland and Wales},
  publisher={},
  address={London},    }