Roots of Canned Heat

Clara Mae Ward was an American gospel singer who achieved great artistic and commercial success during the 1940s and 1950s, as leader of The Famous Ward Singers. A gifted singer and arranger, Ward adopted the lead-switching style, previously used primarily by male gospel quartets, creating opportunities for spontaneous improvisation and vamping by each member of the group, while giving virtuoso singers such as Marion Williams the opportunity to perform the lead vocal in songs such as "Surely, God Is Able", "How I Got Over" and "Packin' Up". The album Surely God Is Able by The Famous Ward Singers was the first by a gospel group to exceed sales of 500,000 units.

Martin Peter Birch was a British music producer and sound engineer. He became renowned for engineering and producing albums recorded predominantly by British rock and metal bands, including Deep Purple, Rainbow, Fleetwood Mac, Whitesnake, Black Sabbath, and Iron Maiden.

Booker T. Washington "Bukka" White was an American Delta blues guitarist and singer. His first full-length biography, The Life and Music of Booker "Bukka" White: Recalling the Blues (2024), has been published by the University Press of Mississippi.