“ ‘The Source of All Good Things’: Hugh Nibley and the Temple.” – Boyd Peterson. Hugh Nibley- A Consecrated Life (SLC: Greg Kofford Books, 2002): 351-363, esp. 355-56.

• Details Hugh Nibley’s involvement with the Apostles and First Presidency on the “history and significance” of the Endowment at a time when changes were being considered. First page of chapter in .pdf format. ISBN 1-58958-020-6

“‘Not to be Riten’: The Mormon Temple Rite as Oral Canon.”- Kathleen Flake. Journal of Ritual Studies 9.2 (1995):1-21. Kathleen Flake is an LDS professor of American Religious History at Vanderbilt University.

Go Forward with Faith: The Biography of Gordon B. Hinckley –Sheri L. Dew. (Salt Lake City: Deseret Book, 1996): 176-184. Gospelink (subscription required) Account of President Hinckley’s very personal involvement with the adaptation of film as a medium for the temple.

While this is indirect, Hugh Nibley’s older articles (such as in Temple and Cosmos or Mormonism and Early Christianity) often refer to the temple ceremony. You can pick up on subtle changes that way. Or, ask an old-timer in the temple sometime.

Longer and respectful treatment of the same, on his website.

“Can the Temple Ceremony Change?” – Mike Ash, FAIR paper.