found: His Natural signs, c1989:CIP t.p. (Laird Addis)
found: LC data base, 2/10/89(hdg.: Addis, Laird)
found: Of mind and music, 1999:CIP data sheet (Laird Clark Addis, Jr., b. Mar. 25, 1937)
found: University of Iowa College of Liberal Arts and Sciences website, Feb. 28, 2022:faculty (Laird Addis; Laird Clark Addis, Jr.; born 1937 in Bath, New York; died July 30, 2018; settled in Iowa City as a child; B.A., philosophy and music, University of Iowa; M.A., philosophy, Brown University; Ph.D., philosophy, University of Iowa; taught in the University of Iowa Department of Philosophy from 1964-2004; Fulbright Scholar, State University of Groningen in the Netherlands, 1970-1971; double bass player; performed with the Cedar Rapids Symphony and the Quad City Symphony; founding member in 1980 of the Iowa City Community String Orchestra; opera enthusiast; composer) - https://clas.uiowa.edu/faculty/laird-addis-1937-2018