found: Garrod, C. Will Bradley and his orchestra, 1986:t.p. (Freddie Slack)
found: Piano stylists [SR] 1952?:label (Freddy Slack)
found: Perf. arts biog. master index, 1981(Slack, Freddie; Slack, Freddy; Slack, Frederic Charles; b. 1910 d. 1965)
found: Myers, Gary E. On that Wisconsin beat, c2006:p. 18 (Freddie Slack; b. Aug. 7, 1910, Westby; d. Aug. 10, 1965, Hollywood, CA)
found: Oxford music online, July 14, 2017:Encyclopedia of popular music (Slack, Freddie; born Frederic Charles Slack, August 7, 1910, La Crosse, Wisconsin; died August 10, 1965, Hollywood, California; composer, pianist and band leader, prominent from the late 30s until the mid-40s, who specialized in the jazz rhythm style, boogie-woogie)
found: Central Avenue sounds, ℗1999:container (The Freddie Slack Trio) booklet, page 88 (with Freddie Slack, piano; recorded with Joe Turner in 1942 for Decca)