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This article is a timeline of well-documented instances of influences on J. R. R. Tolkien's Middle-earth writings.
- ^ Shippey, Tom (2005) [1982]. The Road to Middle-Earth (Third ed.). Grafton (HarperCollins). pp. 388–398. ISBN 978-0-2611-0275-0.
- ^ Lee, Stuart D. (2020) A Companion to J. R. R. Tolkien, Wiley: Philology 13-14 Christianity 446-460 Mythology 244-258 Old English 217-229 Modern literature 350-366 War 461-472 Invented languages 202-214 Art 487-472 Poetry 173-188
- ^ Shippey, Tom (2001). J.R.R. Tolkien: Author of the Century. HarperCollins. pp. 5–6. ISBN 978-0261-10401-3.