found: His Variations on "Creator of infinities", c1979:t.p. (by Richard Wienhorst)
found: Koshgarian, R. Am. orchestral music, 1992(Wienhorst, Richard; b. 1920)
found: ECS Publishing WWW site, April 12, 2019(Richard Wienhorst; born April 21, 1920, Seymour, Indiana, died 2010; faculty member, Music Department, Valparaiso University, from 1946)
found: Legacy.com, April 12, 2019(Richard W. Wienhorst; born April 21, 1920, Seymour, Indiana, died March 31, 2010, Valparaiso, Indiana; lived in Valparaiso)