Armed Forces Radio Services (Basic Music Library) from WW-II

Rare, huge 16" record for Armed Forces Radio Services (Basic Music Library) from WW-II, Volume no.R-39/40 SIDE-1:Church Choir: 5-tracks... SIDE-2: Dorothy Maynor with Frank Black and the NBC Symphony Orchestra:3-tracks. A number of songs, including: Swing Low Sweet Chariot, Sometimes I Feel Like a Motherless Child, Wherefore Dist Thou Leave Me, Eternal Father Strong To Save, Cross of Christ, Onward Christian Soldiers, From Greenland's Icy Mountains and Crown Him With Many Crowns. The total time on the entire record is about 25 minutes. Mint condition. We have no idea as to how many of these exist. Our hunch is that this is quite a scarce historical item.
BACKGROUND: Born Dorothy Leigh Maynor September 3, c. 1910 in Norfolk, Virginia, to Reverend John J. Maynor and Alice Jeffries Maynor; died February 19, 1996, West Chester, Pennsylvania; married Reverend Shelby Rooks, June 24, 1942.
Education: Hampton Institute, B.A., 1933; Westminster Choir School, B.A., 1935; studied singing with Wilfred Klamroth and John Alan Haughton, New York City, beginning 1936.
-- A nice signed program from the 40's or early 50's featuring Dorothy Maynor, sponsored by the Portland, Maine, Community Concert Association. Dorothy Maynor's signature is an original.
-- Vintage Amphion Club program of operatic arias and Negro spirituals performed by noted African American singer Dorothy Maynor at the Russ Auditorium, San Diego, California -- March 30, 1942. Sponsored by Victor Red Seal Records. 6¼" x 12½".
-- Life Magazine article (Dec. 11, 1939) about Dorothy Maynor, "Negro Singer From Virginia Makes Exciting Concert Debut."
-- Dorothy Maynor: 8 x 10 black and white photo is signed in blue ink. Inscribed: Best Wishes to the "326th Opera Club."