found: Jacobi, F. String quartet no. 3 [SR] 1961:labels (Fredell Lack, violin)
found: Who's who in American music. Classical, c1983(Lack, Fredell (Mrs. Ralph Eichhorn); b. Tulsa, Okla.; violinist, teacher)
found: Hixon, D.L. Women in music, 1993(Lack, Fredell; b. 192-?, Tulsa, OK; American violinist, music educator)
found: http://www.legacy.com/obituaries/houstonchronicle/obituary.aspx?n=fredell-lack-eichhorn&pid=186435443&fhid=11226, August 21. 2017(Fredell Lack Eichhorn (1922-2017) passed away on August 20, 2017 in her home in Houston, Texas at the age of 95. Ms. Lack was born in Tulsa, OK))
found: Wikipedia, Aug. 20, 2017(Fredell Lack (February 19, 1922 - August 20, 2017) was an American violinist.)
found: New York times, 29 August 2017(Fredell Lack; born Feb. 19, 1922 in Tulsa, [Oklahoma]; died Aug. 20 [2017] in Houston [Texas], aged 95; an Oklahoma-born violinist and teacher who in a long international career that began in the 1940s was known for intimate interpretations of works by the Romantics.)
notfound: ISNI, 31 August 2017