- Author: Robert H. Duke
- Language: English
- Year: 2014
- Author: Duke Ellington
- Language: English
- Year: 2020
- Author: Martin Hilpert (editor), Jan-Ola Östman (editor), Christine Mertzlufft (editor), Michael Rießler (editor), Janet Duke (editor)
- Language: English
- Year: 2015
- Author: Martin Hilpert (editor), Jan-Ola Östman (editor), Christine Mertzlufft (editor), Michael Rießler (editor), Janet Duke (editor)
- Language: English
- Year: 2015
- Author: Annie Duke
- Language: English
- Year: 2022
Rudolf Steiner
pdf
- Author: Heiner Ullrich, Janet Duke, Daniel Balestrini
- Language: English
- Year: 2008
- Author: Pam Denicolo Julie Reeves Dawn Duke
- Language: English
- Year: 2017
- Author: Dawn Duke Pam Denicolo Erin Henslee
- Language: English
- Year: 2019
- Author: Susan Duke
- Language: English
- Year: 2010
