Conking, who died Wednesday, was part of a four-part harmony quartet that sang with bands led by Artie Shaw, Horace Heidt and Alvino Rey, The Los Angeles Times reported Friday.
In 1938 the sisters -- Maxine, Luise, Alyce and Donna -- were working with Artie Shaw's orchestra when Rey left Heidt to start his own band. The sisters sang with Rey's band until 1943, scoring several hits, including a vocal version of Glenn Miller's classic "In the Mood," the Times said.
Donna King, who married James B. Conkling in 1943, left the group in the late 1940s. Conkling, who played a key role in the formation of Warner Bros. Records, died in 1998.
She returned to appear with her siblings and other family members on ABC's "The King Family Show" that aired during the mid- and late-1960s, the Times said.