Back To School (2008)(with Conference Call) by Gebhard Ullmann (1) published on 2019-02-09T10:53:29Z This is from the 5th CD of the Conference Call Quartet. On this CD you hear Gebhard Ullmann, Michael Jefry Stevens, Joe Fonda and George Schuller. All my CDs can be found at www.gebhard-ullmann.com/shop and many also on my bandcamp site for digital download.