Hervarar saga ok Heidreks konungs. The saga of King Heidrek, 1960.

Tolkien, J.R.R. The monsters and the critics and other essays, 1983: t.p. (Christopher Tolkien) copr. (Christopher Reuel Tolkien)

Baynes, P. A map of Middle-Earth, c1970: map recto (C.J.R. Tolkien)

Biog. & geneal. master index, Mar. 28, 2006 (Tolkien, Christopher (1924-))

Arda reconstructed, 2009: ECIP data view (Christopher Tolkien; son of J.R.R. Tolkien)

Wikipedia, 22 July 2013 (Christopher Reuel Tolkien, the J. stands for John, a baptismal name that he does not ordinarily use (born 21 November 1924) is the third and youngest son of the author J. R. R. Tolkien. Christopher Tolkien was born in Leeds, England, currently lives in France)

Wikipedia, March 15, 2019: (Christopher John Reuel Tolkien; drew the original maps for his father's The Lord of the Rings; studied English at Trinity College, Oxford, taking his BA in 1949 and his B.Litt a few years later)

Washington post WWW site, viewed Jan. 21, 2020 (in obituary dated Jan. 17, 2020: Christopher Tolkien, who played a major role protecting the legacy of his father's "Lord of the Rings" trilogy, died Jan. 16 in Draguignan in southern France. He was 95. Christopher John Reuel Tolkien was born Nov. 21, 1924, in Leeds, England. Like his father, he taught Old English and Middle English at Oxford. He had lived near the French village of Aups since 1975)