Mark E. Peterson notes an article that traces Priesthood ban to Brigham Young rather than Joseph Smith.
Edward L. Kimball, "Spencer W. Kimball and the Revelation on Priesthood," BYU Studies Quarterly 47, no. 2 (2008): 54
On May 25, [1978], Mark E. Petersen called President Kimball's attention to an article that proposed the priesthood policy had begun with Brigham Young, not Joseph Smith, and he suggested that the President might wish to consider this factor.
Edward L. Kimball, Spencer W. Kimball's biographer concluded that "the article almost surely was the 1973 article by Lester E. Bush Jr., 'Mormonism's Negro Doctrine'" (Edward L. Kimball, Lengthen Your Stride: The Presidency of Spencer W. Kimball (Salt Lake City, UT: Deseret Book, 2005), ch. 22 p. 7n41.