Niels Henry Sonne (1907–1994) was a noted librarian, a rare book curator, and expert on the Gutenberg Bible.
Sonne was employed for most of his career as a rare book librarian at the General Theological Seminary in New York City.
"A specialist on the Gutenberg Bible, Dr. [Niels H. Sonne] retired as the seminary's librarian in 1976 after 26 years.
"[2] A copy held by the General Theological Seminary was studied, and found to have a forged page.
[5] and was a widely respected authority on the early manuscript copies of the Latin Bible and church history.