found: NUCMC data from Univ. of Ill. at Urbana-Champaign Archives for Kuypers, J.M. Papers, 1946-1984(Walden Quartet, Univ. of Ill. (Urbana-Champaign campus))
found: LC manual auth. cd.(hdg.: Walden String Quartet)
found: Am. Grove(Walden String Quartet; founded 1934; all the original members played in the Cleveland Orchestra; based initially in Cleveland, then at Cornell University (1946-1947), from 1947 at the University of Illinois; disbanded 1979)
found: Library of Congress Music Division concert, 1955-01-28 [SR] 1955:program notes (Walden String Quartet; Homer Schmitt, Bernard Goodman, violins; John Garvey, viola; Robert Swenson, violoncello)
found: Ives, C. Second stringquartet [i.e. string quartet] [SR] 194-?:labels (Walden String Quartet) labels (Homer Schmitt, Bernard Goodman, violins; Eugene Weigel, viola; Robert Swenson, violoncello)
found: Imbrie, Andrew. University of Illinois Contemporary Music Festival, chamber music concert, March 29, 1957, 1973:recording engineer's notes (Walden Quartet)
found: Walden Quartet/University of Illinois archives, viewed Mar. 19, 2009(Walden Quartet of the University of Illinois; image circa 1965: Homer Schmitt and Bernard Goodman, violins; Robert Swenson, cello; and John Garvey, viola)
found: Robert H. Swenson Papers/University of Illinois Archives, viewed Mar. 19, 2009(Robert H. Swenson, cellist with the Walden String Quartet)
found: Historical sketch of the Columbus Chamber Music Society, viewed Mar. 19, 2009(1948-50: Walden Quartet, then in residence at the University of Illinois)
found: Grove music online, Mar. 19, 2009(Walden String Quartet; founded 1934; disbanded 1979; original members were the violinists Homer C. Schmitt (1911-80) and Bernard M. Goodman (b 1914), the cellist Robert H. Swenson (b 1910) and the viola player LeRoy Collins, who was replaced by five more players in the first 14 years of the group's existence before John C. Garvey (b 1921) became the viola player in 1948; all the original members played in the Cleveland Orchestra; quartet was based initially in Cleveland, then at Cornell University (1946-7), and from 1947 at the University of Illinois)
