This image is in the public domain, as it was originally published before 1978 without a copyright notice in the 1965 University of Michigan yearbook, Michiganensian. No copyright notice appears within this publication. See also: [[:en:Wikipedia:Public domain#Published works|]].
{{Information |Description = Photograph of [[Brothers Four]] at the University of Michigan, Hill Auditorium |Source = 1965 Michiganensian, p. 146 |Date = 1964-1965 academic year |Author = Unidentified (Ensian published by