'Underneath a Harlem Moon ... the Harlem to Paris years of Adelaide Hall' by Iain Cameron Williams. page 394 (1930, August - Adelaide headlines with Bill 'Bojangles' Robinson), pages 389, 390 & 395 (1931 - Adelaide appears four times during her 1931/32 world tour - February (with Noble Sissle), April, July & November), page 396 (1933, June) http://www.amazon.com/Underneath-Harlem-Moon-Paris-Adelaide/dp/B005ZOLV7C