CBS made a commercial recording of this concert. The four album set included a poster of Carnegie Hall from 1907, 2 posters of the band and a souvenir program with a drawing of Carnegie Hall on the cover and photos of the band. Selections, which are not listed in the printed concert program, have been added from the recording, as well as information from All Music Guide, Discogs, and Setlist.fm. There may have been variation in the set lists from night to night. At Carnegie Hall, Vols. 1-4 (Chicago IV) - Chicago | Songs, Reviews, Credits | AllMusic. www.allmusic.com, https://www.allmusic.com/album/at-carnegie-hall-vols-1-4-chicago-iv-mw0000651035. Accessed 19 Jan. 2021. “Chicago (2) - Chicago At Carnegie Hall (Volumes I, II, III And IV).” Discogs, https://www.discogs.com/Chicago-Chicago-At-Carnegie-Hall-Volumes-I-II-III-And-IV/master/83140. Accessed 19 Jan. 2021. “Chicago Setlist at Carnegie Hall, New York.” Setlist.Fm, https://www.setlist.fm/setlist/chicago/1971/carnegie-hall-new-york-ny-3bc4c0ec.html. Accessed 19 Jan. 2021.